1
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Yuan Y, Patel RK, Banik S, Reta TB, Bisht RS, Fong DD, Sankaranarayanan SKRS, Ramanathan S. Proton Conducting Neuromorphic Materials and Devices. Chem Rev 2024; 124:9733-9784. [PMID: 39038231 DOI: 10.1021/acs.chemrev.4c00071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/24/2024]
Abstract
Neuromorphic computing and artificial intelligence hardware generally aims to emulate features found in biological neural circuit components and to enable the development of energy-efficient machines. In the biological brain, ionic currents and temporal concentration gradients control information flow and storage. It is therefore of interest to examine materials and devices for neuromorphic computing wherein ionic and electronic currents can propagate. Protons being mobile under an external electric field offers a compelling avenue for facilitating biological functionalities in artificial synapses and neurons. In this review, we first highlight the interesting biological analog of protons as neurotransmitters in various animals. We then discuss the experimental approaches and mechanisms of proton doping in various classes of inorganic and organic proton-conducting materials for the advancement of neuromorphic architectures. Since hydrogen is among the lightest of elements, characterization in a solid matrix requires advanced techniques. We review powerful synchrotron-based spectroscopic techniques for characterizing hydrogen doping in various materials as well as complementary scattering techniques to detect hydrogen. First-principles calculations are then discussed as they help provide an understanding of proton migration and electronic structure modification. Outstanding scientific challenges to further our understanding of proton doping and its use in emerging neuromorphic electronics are pointed out.
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Affiliation(s)
- Yifan Yuan
- Department of Electrical & Computer Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Ranjan Kumar Patel
- Department of Electrical & Computer Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Suvo Banik
- Department of Mechanical and Industrial Engineering, University of Illinois, Chicago, Illinois 60607, United States
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Tadesse Billo Reta
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Ravindra Singh Bisht
- Department of Electrical & Computer Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Dillon D Fong
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Subramanian K R S Sankaranarayanan
- Department of Mechanical and Industrial Engineering, University of Illinois, Chicago, Illinois 60607, United States
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Shriram Ramanathan
- Department of Electrical & Computer Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
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2
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Zhang A, Oh S, Choi BK, Rotenberg E, Brown TD, Spataru CD, Kinigstein E, Guo J, Sugar JD, Salagre E, Mascaraque A, Michel EG, Shad AC, Zhu J, Witman MD, Kumar S, Talin AA, Fuller EJ. Tuning the Spin Transition and Carrier Type in Rare-Earth Cobaltates via Compositional Complexity. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2406885. [PMID: 39180279 DOI: 10.1002/adma.202406885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 07/29/2024] [Indexed: 08/26/2024]
Abstract
There is growing interest in material candidates with properties that can be engineered beyond traditional design limits. Compositionally complex oxides (CCO), often called high entropy oxides, are excellent candidates, wherein a lattice site shares more than four cations, forming single-phase solid solutions with unique properties. However, the nature of compositional complexity in dictating properties remains unclear, with characteristics that are difficult to calculate from first principles. Here, compositional complexity is demonstrated as a tunable parameter in a spin-transition oxide semiconductor La1- x(Nd, Sm, Gd, Y)x/4CoO3, by varying the population x of rare earth cations over 0.00≤ x≤ 0.80. Across the series, increasing complexity is revealed to systematically improve crystallinity, increase the amount of electron versus hole carriers, and tune the spin transition temperature and on-off ratio. At high a population (x = 0.8), Seebeck measurements indicate a crossover from hole-majority to electron-majority conduction without the introduction of conventional electron donors, and tunable complexity is proposed as new method to dope semiconductors. First principles calculations combined with angle resolved photoemission reveal an unconventional doping mechanism of lattice distortions leading to asymmetric hole localization over electrons. Thus, tunable complexity is demonstrated as a facile knob to improve crystallinity, tune electronic transitions, and to dope semiconductors beyond traditional means.
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Affiliation(s)
- Alan Zhang
- Sandia National Laboratories, 7011 East Ave., Livermore, CA, 94550, USA
| | - Sangheon Oh
- Sandia National Laboratories, 7011 East Ave., Livermore, CA, 94550, USA
| | - Byoung Ki Choi
- Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX, 3127, USA
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Eli Rotenberg
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Timothy D Brown
- Sandia National Laboratories, 7011 East Ave., Livermore, CA, 94550, USA
| | - Catalin D Spataru
- Sandia National Laboratories, 7011 East Ave., Livermore, CA, 94550, USA
| | - Eli Kinigstein
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Jinghua Guo
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Joshua D Sugar
- Sandia National Laboratories, 7011 East Ave., Livermore, CA, 94550, USA
| | - Elena Salagre
- Sandia National Laboratories, 7011 East Ave., Livermore, CA, 94550, USA
| | - Arantzazu Mascaraque
- Departamento de Física de Materiales, Universidad Complutense de Madrid, Madrid, 28040, Spain
| | - Enrique G Michel
- Departamento de Física de la Materia Condensada and Instituto Universitario de Ciencia de Materiales Nicolás Cabrera (INC), Universidad Autónoma de Madrid, Madrid, 28049, Spain
- IFIMAC (Condensed Matter Physics Center), Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - Alison C Shad
- Sandia National Laboratories, 7011 East Ave., Livermore, CA, 94550, USA
| | - Jacklyn Zhu
- Sandia National Laboratories, 7011 East Ave., Livermore, CA, 94550, USA
| | - Matthew D Witman
- Sandia National Laboratories, 7011 East Ave., Livermore, CA, 94550, USA
| | - Suhas Kumar
- Sandia National Laboratories, 7011 East Ave., Livermore, CA, 94550, USA
| | - A Alec Talin
- Sandia National Laboratories, 7011 East Ave., Livermore, CA, 94550, USA
| | - Elliot J Fuller
- Sandia National Laboratories, 7011 East Ave., Livermore, CA, 94550, USA
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3
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Ortiz Hernández N, Skoropata E, Ueda H, Burian M, Alonso JA, Staub U. Magnetoelectric effect in multiferroic nickelate perovskite YNiO 3. COMMUNICATIONS MATERIALS 2024; 5:154. [PMID: 39157450 PMCID: PMC11327100 DOI: 10.1038/s43246-024-00604-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2024] [Accepted: 08/06/2024] [Indexed: 08/20/2024]
Abstract
The interaction of magnetic order and spontaneous polarization is a fundamental coupling with the prospect for the control of electronic properties and magnetism. The connection among magnetic order, charge localization and associated metal-insulator transition (MIT) are cornerstones for materials control. Materials that combine both effects are therefore of great interest for testing models that claim the occurrence of spontaneous polarization from magnetic and charge order. One class of materials proposed to combine these functionalities is the family of RNiO3 (R: Lanthanide or Yttrium), whose members show a clear MIT and an antiferromagnetic ground state and for which an electric polarization has been predicted. Here, using resonant magnetic x-ray scattering with circular polarization and an applied electric field we show that YNiO3 possess a magnetic structure containing domains of spin-rotations that are consistent with an electric polarization. We show a reversal of the magnetic structure with the applied electric field confirming that charge ordered RNiO3 are magnetoelectric type II multiferroics with a MIT.
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Affiliation(s)
- Nazaret Ortiz Hernández
- Swiss Light Source, Paul Scherrer Institute, Forschungssrtasse 111, 5232 Villigen-PSI, Villigen, Switzerland
| | - Elizabeth Skoropata
- Swiss Light Source, Paul Scherrer Institute, Forschungssrtasse 111, 5232 Villigen-PSI, Villigen, Switzerland
| | - Hiroki Ueda
- Swiss Light Source, Paul Scherrer Institute, Forschungssrtasse 111, 5232 Villigen-PSI, Villigen, Switzerland
| | - Max Burian
- Swiss Light Source, Paul Scherrer Institute, Forschungssrtasse 111, 5232 Villigen-PSI, Villigen, Switzerland
| | - José Antonio Alonso
- Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049 Madrid, Spain
| | - Urs Staub
- Swiss Light Source, Paul Scherrer Institute, Forschungssrtasse 111, 5232 Villigen-PSI, Villigen, Switzerland
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4
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Liu Y, Meng Q, Mahmoudi P, Wang Z, Zhang J, Yang J, Li W, Wang D, Li Z, Sorrell C, Li S. Advancing Superconductivity with Interface Engineering. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2405009. [PMID: 39104281 DOI: 10.1002/adma.202405009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 07/01/2024] [Indexed: 08/07/2024]
Abstract
The development of superconducting materials has attracted significant attention not only for their improved performance, such as high transition temperature (TC), but also for the exploration of their underlying physical mechanisms. Recently, considerable efforts have been focused on interfaces of materials, a distinct category capable of inducing superconductivity at non-superconducting material interfaces or augmenting the TC at the interface between a superconducting material and a non-superconducting material. Here, two distinct types of interfaces along with their unique characteristics are reviewed: interfacial superconductivity and interface-enhanced superconductivity, with a focus on the crucial factors and potential mechanisms responsible for enhancing superconducting performance. A series of materials systems is discussed, encompassing both historical developments and recent progress from the perspectives of technical innovations and the exploration of new material classes. The overarching goal is to illuminate pathways toward achieving high TC, expanding the potential of superconducting parameters across interfaces, and propelling superconductivity research toward practical, high-temperature applications.
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Affiliation(s)
- Yichen Liu
- UNSW Materials and Manufacturing Futures Institute, School of Materials Science and Engineering, The University of New South Wales, Kensington, NSW, 2052, Australia
| | - Qingxiao Meng
- UNSW Materials and Manufacturing Futures Institute, School of Materials Science and Engineering, The University of New South Wales, Kensington, NSW, 2052, Australia
| | - Pezhman Mahmoudi
- UNSW Materials and Manufacturing Futures Institute, School of Materials Science and Engineering, The University of New South Wales, Kensington, NSW, 2052, Australia
| | - Ziyi Wang
- UNSW Materials and Manufacturing Futures Institute, School of Materials Science and Engineering, The University of New South Wales, Kensington, NSW, 2052, Australia
| | - Ji Zhang
- UNSW Materials and Manufacturing Futures Institute, School of Materials Science and Engineering, The University of New South Wales, Kensington, NSW, 2052, Australia
| | - Jack Yang
- UNSW Materials and Manufacturing Futures Institute, School of Materials Science and Engineering, The University of New South Wales, Kensington, NSW, 2052, Australia
| | - Wenxian Li
- UNSW Materials and Manufacturing Futures Institute, School of Materials Science and Engineering, The University of New South Wales, Kensington, NSW, 2052, Australia
| | - Danyang Wang
- UNSW Materials and Manufacturing Futures Institute, School of Materials Science and Engineering, The University of New South Wales, Kensington, NSW, 2052, Australia
| | - Zhi Li
- UNSW Materials and Manufacturing Futures Institute, School of Materials Science and Engineering, The University of New South Wales, Kensington, NSW, 2052, Australia
| | - Chris Sorrell
- UNSW Materials and Manufacturing Futures Institute, School of Materials Science and Engineering, The University of New South Wales, Kensington, NSW, 2052, Australia
| | - Sean Li
- UNSW Materials and Manufacturing Futures Institute, School of Materials Science and Engineering, The University of New South Wales, Kensington, NSW, 2052, Australia
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5
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Asmara TC, Green RJ, Suter A, Wei Y, Zhang W, Knez D, Harris G, Tseng Y, Yu T, Betto D, Garcia-Fernandez M, Agrestini S, Klein YM, Kumar N, Galdino CW, Salman Z, Prokscha T, Medarde M, Müller E, Soh Y, Brookes NB, Zhou KJ, Radovic M, Schmitt T. Emergence of Interfacial Magnetism in Strongly-Correlated Nickelate-Titanate Superlattices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2310668. [PMID: 39101291 DOI: 10.1002/adma.202310668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 06/21/2024] [Indexed: 08/06/2024]
Abstract
Strongly-correlated transition-metal oxides are widely known for their various exotic phenomena. This is exemplified by rare-earth nickelates such as LaNiO3, which possess intimate interconnections between their electronic, spin, and lattice degrees of freedom. Their properties can be further enhanced by pairing them in hybrid heterostructures, which can lead to hidden phases and emergent phenomena. An important example is the LaNiO3/LaTiO3 superlattice, where an interlayer electron transfer has been observed from LaTiO3 into LaNiO3 leading to a high-spin state. However, macroscopic emergence of magnetic order associated with this high-spin state has so far not been observed. Here, by using muon spin rotation, x-ray absorption, and resonant inelastic x-ray scattering, direct evidence of an emergent antiferromagnetic order with high magnon energy and exchange interactions at the LaNiO3/LaTiO3 interface is presented. As the magnetism is purely interfacial, a single LaNiO3/LaTiO3 interface can essentially behave as an atomically thin strongly-correlated quasi-2D antiferromagnet, potentially allowing its technological utilization in advanced spintronic devices. Furthermore, its strong quasi-2D magnetic correlations, orbitally-polarized planar ligand holes, and layered superlattice design make its electronic, magnetic, and lattice configurations resemble the precursor states of superconducting cuprates and nickelates, but with an S→1 spin state instead.
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Affiliation(s)
- Teguh Citra Asmara
- PSI Center for Photon Science, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
- European X-Ray Free-Electron Laser Facility GmbH, Holzkoppel 4, 22869, Schenefeld, Germany
| | - Robert J Green
- Department of Physics & Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon, SK, S7N 5E2, Canada
- Stewart Blusson Quantum Matter Institute, University of British Columbia, 2355 East Mall, Vancouver, BC, V6T 1Z4, Canada
| | - Andreas Suter
- Laboratory for Muon-Spin Spectroscopy, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
| | - Yuan Wei
- PSI Center for Photon Science, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
| | - Wenliang Zhang
- PSI Center for Photon Science, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
| | - Daniel Knez
- Institute of Electron Microscopy and Nanoanalysis, Graz University of Technology, Steyrergasse 17, Graz, 8010, Austria
| | - Grant Harris
- Department of Physics & Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon, SK, S7N 5E2, Canada
| | - Yi Tseng
- PSI Center for Photon Science, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
| | - Tianlun Yu
- PSI Center for Photon Science, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
| | - Davide Betto
- European Synchrotron Radiation Facility, 71, avenue des Martyrs, Cedex 9, Grenoble, F-38043, France
| | - Mirian Garcia-Fernandez
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
| | - Stefano Agrestini
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
| | - Yannick Maximilian Klein
- Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
| | - Neeraj Kumar
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
| | - Carlos William Galdino
- PSI Center for Photon Science, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
| | - Zaher Salman
- Laboratory for Muon-Spin Spectroscopy, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
| | - Thomas Prokscha
- Laboratory for Muon-Spin Spectroscopy, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
| | - Marisa Medarde
- Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
| | - Elisabeth Müller
- Electron Microscopy Facility, Paul Scherrer Institut, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
| | - Yona Soh
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
| | - Nicholas B Brookes
- European Synchrotron Radiation Facility, 71, avenue des Martyrs, Cedex 9, Grenoble, F-38043, France
| | - Ke-Jin Zhou
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
| | - Milan Radovic
- PSI Center for Photon Science, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
| | - Thorsten Schmitt
- PSI Center for Photon Science, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland
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6
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Shi Y, Zhao GD, Dabo I, Ramanathan S, Chen LQ. Phase-Field Model of Electronic Antidoping. PHYSICAL REVIEW LETTERS 2024; 132:256502. [PMID: 38996266 DOI: 10.1103/physrevlett.132.256502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 05/21/2024] [Indexed: 07/14/2024]
Abstract
Charge carrier doping usually reduces the resistance of a semiconductor or insulator, but was recently found to dramatically enhance the resistance in certain series of materials. This remarkable antidoping effect has been leveraged to realize synaptic memory trees in nanoscale hydrogenated perovskite nickelates, opening a new direction for neuromorphic computing. To understand these phenomena, we formulate a physical phase-field model of the antidoping effect based on its microscopic mechanism and simulate the voltage-driven resistance change in the prototypical system of hydrogenated perovskite nickelates. Remarkably, the simulations using this model, containing only one adjustable parameter whose magnitude is justified by first-principles calculations, quantitatively reproduce the experimentally observed treelike resistance states, which are shown unambiguously to arise from proton redistribution-induced local band gap enhancement and carrier blockage. Our work lays the foundation for modeling the antidoping phenomenon in strongly correlated materials at the mesoscale, which can provide guidance to the design of novel antidoping-physics-based devices.
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7
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Wyss RM, Kewes G, Marabotti P, Koepfli SM, Schlichting KP, Parzefall M, Bonvin E, Sarott MF, Trassin M, Oezkent M, Lu CH, Gradwohl KP, Perrault T, Habibova L, Marcelli G, Giraldo M, Vermant J, Novotny L, Frimmer M, Weber MC, Heeg S. Bulk-suppressed and surface-sensitive Raman scattering by transferable plasmonic membranes with irregular slot-shaped nanopores. Nat Commun 2024; 15:5236. [PMID: 38897990 PMCID: PMC11187206 DOI: 10.1038/s41467-024-49130-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 05/23/2024] [Indexed: 06/21/2024] Open
Abstract
Raman spectroscopy enables the non-destructive characterization of chemical composition, crystallinity, defects, or strain in countless materials. However, the Raman response of surfaces or thin films is often weak and obscured by dominant bulk signals. Here we overcome this limitation by placing a transferable porous gold membrane, (PAuM) on the surface of interest. Slot-shaped nanopores in the membrane act as plasmonic antennas and enhance the Raman response of the surface or thin film underneath. Simultaneously, the PAuM suppresses the penetration of the excitation laser into the bulk, efficiently blocking its Raman signal. Using graphene as a model surface, we show that this method increases the surface-to-bulk Raman signal ratio by three orders of magnitude. We find that 90% of the Raman enhancement occurs within the top 2.5 nm of the material, demonstrating truly surface-sensitive Raman scattering. To validate our approach, we quantify the strain in a 12.5 nm thin Silicon film and analyze the surface of a LaNiO3 thin film. We observe a Raman mode splitting for the LaNiO3 surface-layer, which is spectroscopic evidence that the surface structure differs from the bulk. These results validate that PAuM gives direct access to Raman signatures of thin films and surfaces.
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Affiliation(s)
- Roman M Wyss
- Institut für Physik und IRIS Adlershof, Humboldt-Universität zu Berlin, 12489, Berlin, Germany
- Soft Materials, Department of Materials, ETH Zürich, 8093 Zürich, Switzerland
| | - Günter Kewes
- Institut für Physik und IRIS Adlershof, Humboldt-Universität zu Berlin, 12489, Berlin, Germany
| | - Pietro Marabotti
- Institut für Physik und IRIS Adlershof, Humboldt-Universität zu Berlin, 12489, Berlin, Germany
| | - Stefan M Koepfli
- Institute of Electromagnetic Fields (IEF), ETH Zürich, 8092 Zürich, Switzerland
| | - Karl-Philipp Schlichting
- Laboratory of Thermodynamics in Emerging Technologies Department of Mechanical and Process Engineering, ETH Zürich, 8092 Zürich, Switzerland
| | | | - Eric Bonvin
- Photonics Lab, ETH Zürich, 8093 Zürich, Switzerland
| | - Martin F Sarott
- Department of Materials, ETH Zürich, 8093 Zürich, Switzerland
| | - Morgan Trassin
- Department of Materials, ETH Zürich, 8093 Zürich, Switzerland
| | | | - Chen-Hsun Lu
- Leibniz-Institut für Kristallzüchtung, 12489, Berlin, Germany
| | | | - Thomas Perrault
- Institut des Molécules et Matériaux du Mans, UMR 6283 CNRS, Le Mans Université, 72085, Le Mans, France
| | - Lala Habibova
- Institut für Physik und IRIS Adlershof, Humboldt-Universität zu Berlin, 12489, Berlin, Germany
| | - Giorgia Marcelli
- Institut für Physik und IRIS Adlershof, Humboldt-Universität zu Berlin, 12489, Berlin, Germany
| | - Marcela Giraldo
- Department of Materials, ETH Zürich, 8093 Zürich, Switzerland
| | - Jan Vermant
- Soft Materials, Department of Materials, ETH Zürich, 8093 Zürich, Switzerland
| | | | | | - Mads C Weber
- Institut des Molécules et Matériaux du Mans, UMR 6283 CNRS, Le Mans Université, 72085, Le Mans, France
| | - Sebastian Heeg
- Institut für Physik und IRIS Adlershof, Humboldt-Universität zu Berlin, 12489, Berlin, Germany.
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8
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Deng X, Liu YX, Yang ZZ, Zhao YF, Xu YT, Fu MY, Shen Y, Qu K, Guan Z, Tong WY, Zhang YY, Chen BB, Zhong N, Xiang PH, Duan CG. Spatial evolution of the proton-coupled Mott transition in correlated oxides for neuromorphic computing. SCIENCE ADVANCES 2024; 10:eadk9928. [PMID: 38820158 PMCID: PMC11141630 DOI: 10.1126/sciadv.adk9928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 04/29/2024] [Indexed: 06/02/2024]
Abstract
The proton-electron coupling effect induces rich spectrums of electronic states in correlated oxides, opening tempting opportunities for exploring novel devices with multifunctions. Here, via modest Pt-aided hydrogen spillover at room temperature, amounts of protons are introduced into SmNiO3-based devices. In situ structural characterizations together with first-principles calculation reveal that the local Mott transition is reversibly driven by migration and redistribution of the predoped protons. The accompanying giant resistance change results in excellent memristive behaviors under ultralow electric fields. Hierarchical tree-like memory states, an instinct displayed in bio-synapses, are further realized in the devices by spatially varying the proton concentration with electric pulses, showing great promise in artificial neural networks for solving intricate problems. Our research demonstrates the direct and effective control of proton evolution using extremely low electric field, offering an alternative pathway for modifying the functionalities of correlated oxides and constructing low-power consumption intelligent devices and neural network circuits.
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Affiliation(s)
- Xing Deng
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
| | - Yu-Xiang Liu
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
| | - Zhen-Zhong Yang
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
| | - Yi-Feng Zhao
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
| | - Ya-Ting Xu
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
| | - Meng-Yao Fu
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
| | - Yu Shen
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
| | - Ke Qu
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
| | - Zhao Guan
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
| | - Wen-Yi Tong
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
| | - Yuan-Yuan Zhang
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
| | - Bin-Bin Chen
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
| | - Ni Zhong
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Ping-Hua Xiang
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Chun-Gang Duan
- Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
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9
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Zheng J, Shi W, Li Z, Zhang J, Yang CY, Zhu Z, Wang M, Zhang J, Han F, Zhang H, Chen Y, Hu F, Shen B, Chen Y, Sun J. Charge-Transfer-Induced Interfacial Ferromagnetism in Ferromagnet-Free Oxide Heterostructures. ACS NANO 2024; 18:9232-9241. [PMID: 38466082 DOI: 10.1021/acsnano.4c01910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Due to the strong interlayer coupling between multiple degrees of freedom, oxide heterostructures have demonstrated exotic properties that are not shown by their bulk counterparts. One of the most interesting properties is ferromagnetism at the interface formed between "nonferromagnetic" compounds. Here we report on the interfacial ferromagnetic phase induced in the superlattices consisting of the two paramagnetic oxides CaRuO3 (CRO) and LaNiO3 (LNO). By varying the sublayer thickness in the superlattice period, we demonstrate that the ferromagnetic order has been established in both CaRuO3 and LaNiO3 sublayers, exhibiting an identical Curie temperature of ∼75 K. The X-ray absorption spectra suggest a strong charge transfer from Ru to Ni at the interface, triggering superexchange interactions between Ru/Ni ions and giving rise to the emergent ferromagnetic phase. Moreover, the X-ray linear dichroism spectra reveal the preferential occupancy of the d3z2-r2 orbital for the Ru ions and the dx2-y2 orbital for the Ni ions in the heterostructure. This leads to different magnetic anisotropy of the superlattices when they are dominated by CRO or LNO sublayers. This work clearly demonstrates a charge-transfer-induced interfacial ferromagnetic phase in the whole ferromagnet-free oxide heterostructures, offering a feasible way to tailor oxide materials for desired functionalities.
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Affiliation(s)
- Jie Zheng
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Wenxiao Shi
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Zhe Li
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jing Zhang
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, People's Republic of China
| | - Chao-Yao Yang
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Zhaozhao Zhu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Mengqin Wang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jine Zhang
- School of Integrated Circuit Science and Engineering, Beihang University, Beijing 100191, People's Republic of China
| | - Furong Han
- School of Integrated Circuit Science and Engineering, Beihang University, Beijing 100191, People's Republic of China
| | - Hui Zhang
- School of Integrated Circuit Science and Engineering, Beihang University, Beijing 100191, People's Republic of China
| | - Yunzhong Chen
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Fengxia Hu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Baogen Shen
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, People's Republic of China
| | - Yuansha Chen
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jirong Sun
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan 250022, China
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10
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Gamage S, Manna S, Zajac M, Hancock S, Wang Q, Singh S, Ghafariasl M, Yao K, Tiwald TE, Park TJ, Landau DP, Wen H, Sankaranarayanan SKS, Darancet P, Ramanathan S, Abate Y. Infrared Nanoimaging of Hydrogenated Perovskite Nickelate Memristive Devices. ACS NANO 2024; 18:2105-2116. [PMID: 38198599 PMCID: PMC10811663 DOI: 10.1021/acsnano.3c09281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024]
Abstract
Solid-state devices made from correlated oxides, such as perovskite nickelates, are promising for neuromorphic computing by mimicking biological synaptic function. However, comprehending dopant action at the nanoscale poses a formidable challenge to understanding the elementary mechanisms involved. Here, we perform operando infrared nanoimaging of hydrogen-doped correlated perovskite, neodymium nickel oxide (H-NdNiO3, H-NNO), devices and reveal how an applied field perturbs dopant distribution at the nanoscale. This perturbation leads to stripe phases of varying conductivity perpendicular to the applied field, which define the macroscale electrical characteristics of the devices. Hyperspectral nano-FTIR imaging in conjunction with density functional theory calculations unveils a real-space map of multiple vibrational states of H-NNO associated with OH stretching modes and their dependence on the dopant concentration. Moreover, the localization of excess charges induces an out-of-plane lattice expansion in NNO which was confirmed by in situ X-ray diffraction and creates a strain that acts as a barrier against further diffusion. Our results and the techniques presented here hold great potential for the rapidly growing field of memristors and neuromorphic devices wherein nanoscale ion motion is fundamentally responsible for function.
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Affiliation(s)
- Sampath Gamage
- Department
of Physics and Astronomy, University of
Georgia, Athens, Georgia 30602, United States
| | - Sukriti Manna
- Center for
Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Department
of Mechanical and Industrial Engineering, University of Illinois, Chicago, Illinois 60607, United States
| | - Marc Zajac
- Advanced
Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Steven Hancock
- Center
for
Simulational Physics and Department of Physics and Astronomy, University of Georgia, Athens, Georgia 30602, United States
| | - Qi Wang
- School
of
Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Sarabpreet Singh
- Department
of Physics and Astronomy, University of
Georgia, Athens, Georgia 30602, United States
| | - Mahdi Ghafariasl
- Department
of Physics and Astronomy, University of
Georgia, Athens, Georgia 30602, United States
| | - Kun Yao
- School
of
Electrical and Computer Engineering, University
of Georgia, Athens, Georgia 30602, United States
| | - Tom E. Tiwald
- J.A. Woollam
Co., Inc., Lincoln, Nebraska 68508, United States
| | - Tae Joon Park
- School
of
Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - David P. Landau
- Center
for
Simulational Physics and Department of Physics and Astronomy, University of Georgia, Athens, Georgia 30602, United States
| | - Haidan Wen
- Advanced
Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Materials
Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Subramanian K.
R. S. Sankaranarayanan
- Center for
Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Department
of Mechanical and Industrial Engineering, University of Illinois, Chicago, Illinois 60607, United States
| | - Pierre Darancet
- Center for
Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Northwestern
Argonne Institute of Science and Engineering, Evanston, Illinois 60208, United States
| | - Shriram Ramanathan
- School
of
Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Department
of Electrical & Computer Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Yohannes Abate
- Department
of Physics and Astronomy, University of
Georgia, Athens, Georgia 30602, United States
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11
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Basu R, Kumawat R, Sahu M, Miah AB, Mitra P, Mukherjee GD. Role of electron and hole doping in the NdNi 1-xV xO 3 nanostructure. Phys Chem Chem Phys 2023; 25:31741-31746. [PMID: 37964748 DOI: 10.1039/d3cp01409f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Neodymium nickelate, NdNiO3, attracts attention due to the simultaneous occurrence of several phase transitions around the same temperature. The electronic properties of NdNiO3 are extremely complex as structural distortion, electron correlation, charge ordering, and orbital overlapping play significant roles in the transitions. We report the effects of electron and hole injection via doping a single 3d metal, V, in the NdNiO3 nanostructure to understand the variations in the electronic properties without any structural distortion. A reversible resistivity modulation of more than five orders of magnitude via hole doping and complete suppression of the metal to insulator transition via electron doping is observed along with the switching of major charge carriers. The modulation of electronic properties without any structural distortion and external strain opens up new directions to consider the NdNi1-xVxO3 nanostructures applicable as emerging electronic devices.
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Affiliation(s)
- Raktima Basu
- National Centre for High Pressure Studies, Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Mohanpur 741246, Nadia, West Bengal, India.
| | - Reshma Kumawat
- National Centre for High Pressure Studies, Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Mohanpur 741246, Nadia, West Bengal, India.
| | - Mrinmay Sahu
- National Centre for High Pressure Studies, Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Mohanpur 741246, Nadia, West Bengal, India.
| | - Abu Bakkar Miah
- Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Mohanpur 741246, Nadia, West Bengal, India
| | - Partha Mitra
- Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Mohanpur 741246, Nadia, West Bengal, India
| | - Goutam Dev Mukherjee
- National Centre for High Pressure Studies, Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Mohanpur 741246, Nadia, West Bengal, India.
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12
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Zhao J, Ran Y, Pei Y, Wei Y, Sun J, Zhang Z, Wang J, Zhou Z, Wang Z, Sun Y, Yan X. Memristors based on NdNiO 3 nanocrystals film as sensory neurons for neuromorphic computing. MATERIALS HORIZONS 2023; 10:4521-4531. [PMID: 37555245 DOI: 10.1039/d3mh00835e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
By mimicking the behavior of the human brain, artificial neural systems offer the possibility to further improve computing efficiency and solve the von Neumann bottleneck. In particular, neural systems with perceptual capability expand the application field and lay a good foundation for the construction of perceptual storage and computational systems. However, research on neurons with perceptual functions is still relatively scarce, with most works focusing on optoelectronic synapses. The neuron is important for neuromorphic computing systems because neurons output excitatory or inhibitory stimuli to regulate the weight of synapses. Therefore, the construction of sensory neurons is crucial to expand the application range of brain-like neural computing. Here, an artificial sensory neuron is proposed, which is constructed using a photosensitive bipolar threshold switching memristor based on NdNiO3 (NNO) nanocrystals. These metallic phase nanocrystals can not only enhance the local electric field, but also act as a reservoir for defects (VoS) to guide the growth of conductive filaments and stabilize the performance of the device. They present stable bipolar threshold switching behavior with a low 120 nW set power, and the operating voltages decreased in light due to photocarrier action. A leaky integrate firing (LIF) neuron has been realized, which achieved key biological neuron functions, such as all-or-nothing spiking, threshold-driven firing, refractory period, and spiking frequency modulation. The LIF neurons receiving optical inputs have the properties of an artificial sensory neuron. It could regulate the spiking output frequency at different light densities, which could be used for a ship approaching a port. This work provides a promising hardware implementation towards constructing high-performance artificial intelligence to assist ships at night in a sensory system.
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Affiliation(s)
- Jianhui Zhao
- Key Laboratory of Brain-Like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, People's Republic of China.
| | - Yunfeng Ran
- Key Laboratory of Brain-Like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, People's Republic of China.
| | - Yifei Pei
- Hebei Key Laboratory of Optic-Electronic Information Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, People's Republic of China
| | - Yiheng Wei
- Key Laboratory of Brain-Like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, People's Republic of China.
| | - Jiameng Sun
- Key Laboratory of Brain-Like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, People's Republic of China.
| | - Zixuan Zhang
- Key Laboratory of Brain-Like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, People's Republic of China.
| | - Jiacheng Wang
- Key Laboratory of Brain-Like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, People's Republic of China.
| | - Zhenyu Zhou
- Key Laboratory of Brain-Like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, People's Republic of China.
| | - Zhongrong Wang
- Key Laboratory of Brain-Like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, People's Republic of China.
| | - Yong Sun
- Key Laboratory of Brain-Like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, People's Republic of China.
| | - Xiaobing Yan
- Key Laboratory of Brain-Like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, People's Republic of China.
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13
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Park TJ, Deng S, Manna S, Islam ANMN, Yu H, Yuan Y, Fong DD, Chubykin AA, Sengupta A, Sankaranarayanan SKRS, Ramanathan S. Complex Oxides for Brain-Inspired Computing: A Review. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2203352. [PMID: 35723973 DOI: 10.1002/adma.202203352] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/02/2022] [Indexed: 06/15/2023]
Abstract
The fields of brain-inspired computing, robotics, and, more broadly, artificial intelligence (AI) seek to implement knowledge gleaned from the natural world into human-designed electronics and machines. In this review, the opportunities presented by complex oxides, a class of electronic ceramic materials whose properties can be elegantly tuned by doping, electron interactions, and a variety of external stimuli near room temperature, are discussed. The review begins with a discussion of natural intelligence at the elementary level in the nervous system, followed by collective intelligence and learning at the animal colony level mediated by social interactions. An important aspect highlighted is the vast spatial and temporal scales involved in learning and memory. The focus then turns to collective phenomena, such as metal-to-insulator transitions (MITs), ferroelectricity, and related examples, to highlight recent demonstrations of artificial neurons, synapses, and circuits and their learning. First-principles theoretical treatments of the electronic structure, and in situ synchrotron spectroscopy of operating devices are then discussed. The implementation of the experimental characteristics into neural networks and algorithm design is then revewed. Finally, outstanding materials challenges that require a microscopic understanding of the physical mechanisms, which will be essential for advancing the frontiers of neuromorphic computing, are highlighted.
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Affiliation(s)
- Tae Joon Park
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Sunbin Deng
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Sukriti Manna
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - A N M Nafiul Islam
- Department of Electrical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Haoming Yu
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Yifan Yuan
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Dillon D Fong
- Materials Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Alexander A Chubykin
- Department of Biological Sciences, Purdue Institute for Integrative Neuroscience, Purdue University, West Lafayette, IN, 47907, USA
| | - Abhronil Sengupta
- Department of Electrical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Subramanian K R S Sankaranarayanan
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL, 60439, USA
- Department of Mechanical and Industrial Engineering, University of Illinois Chicago, Chicago, IL, 60607, USA
| | - Shriram Ramanathan
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
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14
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Bisht RS, Park J, Yu H, Wu C, Tilak N, Rangan S, Park TJ, Yuan Y, Das S, Goteti U, Yi HT, Hijazi H, Al-Mahboob A, Sadowski JT, Zhou H, Oh S, Andrei EY, Allen MT, Kuzum D, Frano A, Dynes RC, Ramanathan S. Spatial Interactions in Hydrogenated Perovskite Nickelate Synaptic Networks. NANO LETTERS 2023; 23:7166-7173. [PMID: 37506183 DOI: 10.1021/acs.nanolett.3c02076] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
A key aspect of how the brain learns and enables decision-making processes is through synaptic interactions. Electrical transmission and communication in a network of synapses are modulated by extracellular fields generated by ionic chemical gradients. Emulating such spatial interactions in synthetic networks can be of potential use for neuromorphic learning and the hardware implementation of artificial intelligence. Here, we demonstrate that in a network of hydrogen-doped perovskite nickelate devices, electric bias across a single junction can tune the coupling strength between the neighboring cells. Electrical transport measurements and spatially resolved diffraction and nanoprobe X-ray and scanning microwave impedance spectroscopic studies suggest that graded proton distribution in the inhomogeneous medium of hydrogen-doped nickelate film enables this behavior. We further demonstrate signal integration through the coupling of various junctions.
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Affiliation(s)
- Ravindra Singh Bisht
- Department of Electrical and Computer Engineering, Rutgers University, Piscataway, New Jersey 08854, United States
| | - Jaeseoung Park
- Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Haoming Yu
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Chen Wu
- Department of Physics, University of California, San Diego, La Jolla, California 92093, United States
| | - Nikhil Tilak
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, United States
| | - Sylvie Rangan
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, United States
| | - Tae J Park
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Yifan Yuan
- Department of Electrical and Computer Engineering, Rutgers University, Piscataway, New Jersey 08854, United States
| | - Sarmistha Das
- Department of Physics, University of California, San Diego, La Jolla, California 92093, United States
| | - Uday Goteti
- Department of Physics, University of California, San Diego, La Jolla, California 92093, United States
| | - Hee Taek Yi
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, United States
| | - Hussein Hijazi
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, United States
| | - Abdullah Al-Mahboob
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Jerzy T Sadowski
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Hua Zhou
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Seongshik Oh
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, United States
| | - Eva Y Andrei
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, United States
| | - Monica T Allen
- Department of Physics, University of California, San Diego, La Jolla, California 92093, United States
| | - Duygu Kuzum
- Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Alex Frano
- Department of Physics, University of California, San Diego, La Jolla, California 92093, United States
| | - Robert C Dynes
- Department of Physics, University of California, San Diego, La Jolla, California 92093, United States
| | - Shriram Ramanathan
- Department of Electrical and Computer Engineering, Rutgers University, Piscataway, New Jersey 08854, United States
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15
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Tyunina M, Savinov M, Pacherova O, Dejneka A. Small-polaron transport in perovskite nickelates. Sci Rep 2023; 13:12493. [PMID: 37528184 PMCID: PMC10394062 DOI: 10.1038/s41598-023-39821-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 07/31/2023] [Indexed: 08/03/2023] Open
Abstract
Knowledge of the explicit mechanisms of charge transport is preeminent for a fundamental understanding of the metal-to-insulator transition in ABO3-type perovskite rare-earth nickelates and for potential applications of these technologically promising materials. Here we suggest that owing to intrinsic Jahn-Teller-driven carrier localization, small-polaron transport is innate in nickelates. We demonstrate experimental evidence for such transport by investigating AC conductivity over a broad range of temperatures and frequencies in epitaxial SmNiO3 films. We reveal the hopping mechanism of conductivity, Holstein-type activation energy for hopping, nonclassical relaxation behavior, and nonclassical consistency between activation and relaxation. By analyzing these observations, we validate small-polaron transport. We anticipate that our findings can lead to precise tailoring of the DC and AC conductivity in nickelates as requested for fruitful employment of these materials. We also believe that further investigations of self-trapped small polarons are essential for a comprehensive understanding of nickelates.
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Affiliation(s)
- M Tyunina
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 18220, Prague, Czech Republic.
- Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, P. O. Box 4500, Fl-90014, Oulu, Finland.
| | - M Savinov
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 18220, Prague, Czech Republic
| | - O Pacherova
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 18220, Prague, Czech Republic
| | - A Dejneka
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 18220, Prague, Czech Republic
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16
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Kundu S, Patel RK, Middey S, Bansal B. Dynamic hysteresis at a noisy saddle node shows power-law scaling but nonuniversal exponent. Phys Rev E 2023; 108:024101. [PMID: 37723676 DOI: 10.1103/physreve.108.024101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 06/09/2023] [Indexed: 09/20/2023]
Abstract
Dynamic hysteresis, viz., delay in switching of a bistable system on account of the finite sweep rate of the drive, has been extensively studied in dynamical and thermodynamic systems. Dynamic hysteresis results from slowing of the response around a saddle-node bifurcation. As a consequence, the hysteresis area increases with the sweep rate. Mean-field theory, relevant for noise-free situations, predicts power-law scaling with the area scaling exponent of 2/3. We have experimentally investigated the dynamic hysteresis for a thermally driven metal-insulator transition in a high-quality NdNiO_{3} thin film and found the scaling exponent to be about 1/3, far less than the mean-field value. To understand this, we have numerically studied Langevin dynamics of the order parameter and found that noise, which can be thought to parallel finite temperature effects, influences the character of dynamic hysteresis by systematically lowering the dynamical exponent to as small as 0.2. The power-law scaling character, on the other hand, is unaffected in the range of chosen parameters. This work rationalizes the ubiquitous power-law scaling of the dynamic hysteresis as well as the wide variation in the scaling exponent between 0.66 and 0.2 observed in different systems over the last 30 years.
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Affiliation(s)
- Satyaki Kundu
- Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia 741246, West Bengal, India
| | - Ranjan Kumar Patel
- Department of Physics, Indian Institute of Science, Bengaluru 560012, India
| | - Srimanta Middey
- Department of Physics, Indian Institute of Science, Bengaluru 560012, India
| | - Bhavtosh Bansal
- Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia 741246, West Bengal, India
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17
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Kim D, Lee J, Kim J, Sohn H. Reset-First and Multibit-Level Resistive-Switching Behavior of Lanthanum Nickel Oxide (LaNiO 3-x) Thin Films. MATERIALS (BASEL, SWITZERLAND) 2023; 16:4992. [PMID: 37512267 PMCID: PMC10384036 DOI: 10.3390/ma16144992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 07/09/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023]
Abstract
The resistive random-access memory (RRAM) with multi-level storage capability has been considered one of the most promising emerging devices to mimic synaptic behavior and accelerate analog computations. In this study, we investigated the reset-first bipolar resistive switching (RS) and multi-level characteristics of a LaNiO3-x thin film deposited using a reactive magnetron co-sputtering method. Polycrystalline phases of LaNiO3 (LNO), without La2O3 and NiO phases, were observed at similar fractions of Ni and La at a constant partial pressure of oxygen. The relative chemical proportions of Ni3+ and Ni2+ ions in LaNiO3-x indicated that it was an oxygen-deficient LaNiO3-x thin film, exhibiting RS behavior, compared to LNO without Ni2+ ions. The TiN/LaNiO3-x/Pt devices exhibited gradual resistance changes under various DC/AC voltage sweeps and consecutive pulse modes. The nonlinearity values of the conductance, measured via constant-pulse programming, were 0.15 for potentiation and 0.35 for depression, indicating the potential of the as-fabricated devices as analog computing devices. The LaNiO3-x-based device could reach multi-level states without an electroforming step and is a promising candidate for state-of-the-art RS memory and synaptic devices for neuromorphic computing.
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Affiliation(s)
- Daewoo Kim
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Jeongwoo Lee
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Jaeyeon Kim
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Hyunchul Sohn
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea
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18
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Wei W, Vu D, Zhang Z, Walker FJ, Ahn CH. Superconducting Nd 1-xEu xNiO 2 thin films using in situ synthesis. SCIENCE ADVANCES 2023; 9:eadh3327. [PMID: 37406111 DOI: 10.1126/sciadv.adh3327] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 05/31/2023] [Indexed: 07/07/2023]
Abstract
We report on superconductivity in Nd1-xEuxNiO2 using Eu as a 4f dopant of the parent NdNiO2 infinite-layer compound. We use an all-in situ molecular beam epitaxy reduction process to achieve the superconducting phase, providing an alternate method to the ex situ CaH2 reduction process to induce superconductivity in the infinite-layer nickelates. The Nd1-xEuxNiO2 samples exhibit a step-terrace structure on their surfaces, have a Tc onset of 21 K at x = 0.25, and have a large upper critical field that may be related to Eu 4f doping.
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Affiliation(s)
- Wenzheng Wei
- Department of Applied Physics, Yale University, New Haven, CT 06520, USA
| | - Dung Vu
- Department of Applied Physics, Yale University, New Haven, CT 06520, USA
| | - Zhan Zhang
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Frederick J Walker
- Department of Applied Physics, Yale University, New Haven, CT 06520, USA
| | - Charles H Ahn
- Department of Applied Physics, Yale University, New Haven, CT 06520, USA
- Department of Physics, Yale University, New Haven, CT 06520, USA
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, CT 06520, USA
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19
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Tong L, Li H, Gong H, Xu N, Wang Z, Guo Q, Fan T. Investigation of thermal control in phase-changing ABO 3 perovskites via first-principles predictions: general mechanism of solar absorptivity. Phys Chem Chem Phys 2023. [PMID: 37403514 DOI: 10.1039/d3cp01493b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2023]
Abstract
The fundamental mechanism of solar absorbance during the phase-change process is investigated in ABO3 perovskites based on first-principles predictions. A Gaussian-like relationship between the solar absorbance and band gaps is established, which follows the Shockley-Queisser limiting efficiency. For ABO3 perovskites with bandgaps of Eg > 3.5 eV, a low solar absorbance is obtained, whereas a high solar absorbance is obtained for ABO3 perovskites, with band gaps ranging from 0.25 to 2.2 eV. The relationship between the orbital character of the density of states (DOS) and the absorption spectra reveals that ABO3 perovskites with magnetic (strongly interacting) and distorted crystal structures always exhibit a higher solar absorptivity. In contrast, non-magnetic and cubic ABO3 perovskites always exhibit a lower solar absorptivity. Moreover, the tunable solar absorptivity always undergoes a phase change from cubic to large distorted crystal structures in ABO3 perovskites with strong interactions. These results can be attributed to a rich structural, electronic, and magnetic phase diagram resulting from the strong interplay between the lattice, spin, and orbital degrees of freedom, which induce highly tunable optical characteristics in the phase-change process. The findings presented in this study are critical for the development of ABO3 perovskite-based smart thermal control materials in the spacecraft field.
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Affiliation(s)
- Liping Tong
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Hongchao Li
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Hao Gong
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Nianao Xu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Zhongyang Wang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Qixin Guo
- Synchrotron Light Application Center, Saga University, Saga 840-8502, Japan
| | - Tongxiang Fan
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
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20
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Matos R, Pala N. A Review of Phase-Change Materials and Their Potential for Reconfigurable Intelligent Surfaces. MICROMACHINES 2023; 14:1259. [PMID: 37374844 DOI: 10.3390/mi14061259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 06/11/2023] [Accepted: 06/13/2023] [Indexed: 06/29/2023]
Abstract
Phase-change materials (PCMs) and metal-insulator transition (MIT) materials have the unique feature of changing their material phase through external excitations such as conductive heating, optical stimulation, or the application of electric or magnetic fields, which, in turn, results in changes to their electrical and optical properties. This feature can find applications in many fields, particularly in reconfigurable electrical and optical structures. Among these applications, the reconfigurable intelligent surface (RIS) has emerged as a promising platform for both wireless RF applications as well as optical ones. This paper reviews the current, state-of-the-art PCMs within the context of RIS, their material properties, their performance metrics, some applications found in the literature, and how they can impact the future of RIS.
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Affiliation(s)
- Randy Matos
- Department of Electrical & Computer Engineering, Florida International University, Miami, FL 33174, USA
| | - Nezih Pala
- Department of Electrical & Computer Engineering, Florida International University, Miami, FL 33174, USA
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21
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Machado P, Guzmán R, Morera RJ, Alcalà J, Palau A, Zhou W, Coll M. Chemical Synthesis of La 0.75Sr 0.25CrO 3 Thin Films for p-Type Transparent Conducting Electrodes. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2023; 35:3513-3521. [PMID: 37181670 PMCID: PMC10173867 DOI: 10.1021/acs.chemmater.2c03831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 03/24/2023] [Indexed: 05/16/2023]
Abstract
The imperative need for highly performant and stable p-type transparent electrodes based on abundant metals is stimulating the research on perovskite oxide thin films. Moreover, exploring the preparation of these materials with the use of cost-efficient and scalable solution-based techniques is a promising approach to extract their full potential. Herein, we present the design of a chemical route, based on metal nitrate precursors, for the preparation of pure phase La0.75Sr0.25CrO3 (LSCO) thin films to be used as a p-type transparent conductive electrode. Different solution chemistries have been evaluated to ultimately obtain dense, epitaxial, and almost relaxed LSCO films. Optical characterization of the optimized LSCO films reveals promising high transparency with ∼67% transmittance while room temperature resistivity values are 1.4 Ω·cm. It is suggested that the presence of structural defects, i.e., antiphase boundaries and misfit dislocations, affects the electrical behavior of LSCO films. Monochromated electron energy loss spectroscopy allowed changes in the electronic structure in LSCO films to be determined, revealing the creation of Cr4+ and unoccupied states at the O 2p upon Sr-doping. This work offers a new venue to prepare and further investigate cost-effective functional perovskite oxides with potential to be used as p-type transparent conducting electrodes and be easily integrated in many oxide heterostructures.
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Affiliation(s)
- Pamela Machado
- Institut
de Ciència de Materials de Barcelona ICMAB-CSIC, Campus UAB, Bellaterra 08193, Spain
| | - Roger Guzmán
- School
of Physical Sciences, University of Chinese
Academy of Sciences, Beijing 100049, China
| | - Ramon J. Morera
- Institut
de Ciència de Materials de Barcelona ICMAB-CSIC, Campus UAB, Bellaterra 08193, Spain
| | - Jordi Alcalà
- Institut
de Ciència de Materials de Barcelona ICMAB-CSIC, Campus UAB, Bellaterra 08193, Spain
| | - Anna Palau
- Institut
de Ciència de Materials de Barcelona ICMAB-CSIC, Campus UAB, Bellaterra 08193, Spain
| | - Wu Zhou
- School
of Physical Sciences, University of Chinese
Academy of Sciences, Beijing 100049, China
| | - Mariona Coll
- Institut
de Ciència de Materials de Barcelona ICMAB-CSIC, Campus UAB, Bellaterra 08193, Spain
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22
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Shi Y, Chen LQ. Sublattice-Dependent Antiferromagnetic Transitions in Rare Earth Nickelates. PHYSICAL REVIEW LETTERS 2023; 130:186801. [PMID: 37204879 DOI: 10.1103/physrevlett.130.186801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 03/05/2023] [Accepted: 04/19/2023] [Indexed: 05/21/2023]
Abstract
Perovskite rare earth nickelates exhibit remarkably rich physics in their metal-insulator and antiferromagnetic transitions, and there has been a long-standing debate on whether their magnetic structures are collinear or noncollinear. Through symmetry consideration based on the Landau theory, we discover that the antiferromagnetic transitions on the two nonequivalent Ni sublattices occur separately at different Néel temperatures induced by the O breathing mode. It is manifested by two kinks on the temperature-dependent magnetic susceptibilities with the secondary kink being continuous in the collinear magnetic structure but discontinuous in the noncollinear one. The prediction on the secondary discontinuous kink is corroborated by an existing magnetic susceptibility measurement on bulk single-crystalline nickelates, thus strongly supporting the noncollinear nature of the magnetic structure in bulk nickelates, thereby shedding new light on the long-standing debate.
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Affiliation(s)
- Yin Shi
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Long-Qing Chen
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
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23
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Zhang Y, Zhang J, He X, Wang J, Ghosez P. Rare-earth control of phase transitions in infinite-layer nickelates. PNAS NEXUS 2023; 2:pgad108. [PMID: 37181050 PMCID: PMC10167552 DOI: 10.1093/pnasnexus/pgad108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 03/16/2023] [Indexed: 05/16/2023]
Abstract
Perovskite nickelates RNiO3 (R = rare-earth ion) exhibit complex rare-earth ion dependent phase diagram and high tunability of various appealing properties. Here, combining first- and finite-temperature second-principles calculations, we explicitly demonstrate that the superior merits of the interplay among lattice, electron, and spin degrees of freedom can be passed to RNiO2, which recently gained significant interest as superconductors. We unveil that decreasing the rare-earth size directly modulates the structural, electronic, and magnetic properties and naturally groups infinite-layer nickelates into two categories in terms of the Fermi surface and magnetic dimensionality: compounds with large rare-earth sizes (La, Pr) closely resemble the key properties of CaCuO2, showing quasi-two-dimensional (2D) antiferromagnetic (AFM) correlations and strongly localized d x 2 - y 2 orbitals around the Fermi level; the compounds with small rare-earth sizes (Nd-Lu) are highly analogous to ferropnictides, showing three-dimensional (3D) magnetic dimensionality and strong k z dispersion of d 3 z 2 - r 2 electrons at the Fermi level. Additionally, we highlight that RNiO2 with R = Nd-Lu exhibit on cooling a structural transition with the appearance of oxygen rotation motion, which is softened by the reduction of rare-earth size and enhanced by spin-rotation couplings. The rare-earth control of k z dispersion and structural phase transition might be the key factors differentiating the distinct upper critical field and resistivity in different compounds. The established original phase diagram summarizing the temperature and rare-earth controlled structural, electronic, and magnetic transitions in RNiO2 compounds provides rich structural and chemical flexibility to tailor the superconducting property.
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Affiliation(s)
- Yajun Zhang
- Key Laboratory of Mechanics on Disaster and Environment in Western China Attached to The Ministry of Education of China, Lanzhou University, Lanzhou 730000 Gansu, China
- Department of Mechanics and Engineering Science, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000 Gansu, China
| | - Jingtong Zhang
- Theoretical Materials Physics, Q-MAT, CESAM, Université de Liège, B-4000 Liège, Belgium
- Department of Engineering Mechanics and Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
- Zhejiang Laboratory, Hangzhou, 311100 Zhejiang, China
| | - Xu He
- Theoretical Materials Physics, Q-MAT, CESAM, Université de Liège, B-4000 Liège, Belgium
| | - Jie Wang
- Department of Engineering Mechanics and Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
- Zhejiang Laboratory, Hangzhou, 311100 Zhejiang, China
| | - Philippe Ghosez
- Theoretical Materials Physics, Q-MAT, CESAM, Université de Liège, B-4000 Liège, Belgium
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24
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Tang X, Luo Z, Cui Y. Band Gaps and Optical Properties of RENiO 3 upon Strain: Combining First-Principles Calculations and Machine Learning. MATERIALS (BASEL, SWITZERLAND) 2023; 16:3070. [PMID: 37109905 PMCID: PMC10140892 DOI: 10.3390/ma16083070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 04/11/2023] [Accepted: 04/11/2023] [Indexed: 06/19/2023]
Abstract
Rare earth nickel-based perovskite oxides (RENiO3) have been widely studied over recent decades because of their unique properties. In the synthesis of RENiO3 thin films, a lattice mismatch frequently exists between the substrates and the thin films, which may affect the optical properties of RENiO3. In this paper, the first-principles calculations were employed to study the electronic and optical properties of RENiO3 under strain. The results showed that with the increase in tensile strength, the band gap generally shows a widening trend. For optical properties, the absorption coefficients increase with the enhancement of photon energies in the far-infrared range. The compressive strain increases the light absorption, while the tensile strain suppresses it. For the reflectivity spectrum in the far-infrared range, a minimum reflectivity displays around the photon energy of 0.3 eV. The tensile strain enhances the reflectivity in the range of 0.05-0.3 eV, whereas it decreases it when the photon energies are larger than 0.3 eV. Furthermore, machine learning algorithms were applied and found that the planar epitaxial strain, electronegativity, volume of supercells, and rare earth element ion radius play key roles in the band gaps. Photon energy, electronegativity, band gap, the ionic radius of the rare earth element, and the tolerance factor are key parameters significantly influencing the optical properties.
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25
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Li L, Yu D, Wei Y, Sun Y, Zhao J, Zhou Z, Yang J, Zhang Z, Yan X. A SmNiO 3 memristor with artificial synapse function properties and the implementation of Boolean logic circuits. NANOSCALE 2023; 15:7105-7114. [PMID: 36988405 DOI: 10.1039/d2nr06044b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Recently, with the improvement of the requirements for fast and efficient data processing in the era of artificial intelligence, new forms of computing have come into being. Developing memristor devices that can simulate the brain's computing neutral network is particularly important for applications in the field of artificial intelligence. However, there are still some challenges in their biological function simulation and related circuit design. In this work, a memristor based on perovskite rare earth nickelates (RNiO3) is presented with excellent electrical performance, including three orders of magnitude higher current switching ratio and good repeatability, and can achieve bidirectional conductance regulation like weight modulation in bio-synapse. Furthermore, the synaptic like characteristics of the device have been mimicked successfully, such as excitatory postsynaptic current (EPSC), paired pulse facilitation (PPF), classical double pulse spike time-dependent plasticity (classical pair-STDP), triplet spike time-dependent plasticity (triplet-STDP), short-term plasticity (STP), long-term plasticity (LTP), the refractory period phenomenon and learning and forgetting rules. In particular, two synaptic devices and a leaky integrate-and-fire (LIF) neuron device are used to achieve a logic gate circuit to realize "AND", "OR", and "NOT" functions. The device paves the way for the application of high-density circuits in artificial intelligence.
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Affiliation(s)
- Lei Li
- School of Life Sciences, Institute of Life Science and Green Development, Key Laboratory of Brain-like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, P. R. China.
| | - Dongqing Yu
- School of Life Sciences, Institute of Life Science and Green Development, Key Laboratory of Brain-like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, P. R. China.
| | - Yiheng Wei
- School of Life Sciences, Institute of Life Science and Green Development, Key Laboratory of Brain-like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, P. R. China.
| | - Yong Sun
- School of Life Sciences, Institute of Life Science and Green Development, Key Laboratory of Brain-like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, P. R. China.
| | - Jianhui Zhao
- School of Life Sciences, Institute of Life Science and Green Development, Key Laboratory of Brain-like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, P. R. China.
| | - Zhenyu Zhou
- School of Life Sciences, Institute of Life Science and Green Development, Key Laboratory of Brain-like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, P. R. China.
| | - Jie Yang
- School of Life Sciences, Institute of Life Science and Green Development, Key Laboratory of Brain-like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, P. R. China.
| | | | - Xiaobing Yan
- School of Life Sciences, Institute of Life Science and Green Development, Key Laboratory of Brain-like Neuromorphic Devices and Systems of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, P. R. China.
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26
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Wlazło M, Malyi OI. Effect of pressure on the electronic structure of antiferromagnetic and paramagnetic YNiO 3: the role of disproportionation. Phys Chem Chem Phys 2023; 25:7003-7009. [PMID: 36809455 DOI: 10.1039/d2cp05618f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The dependence of electronic properties of quantum materials on external controls (e.g., pressure and temperature) is one of the fundamentals of neuromorphic computing, sensors, etc. Until recently, it has been believed that the theoretical description of such compounds cannot be accomplished using "traditional" density functional theory, and more advanced methods like dynamic mean-field theory should be utilized instead. Focusing here on the example of long-range ordered antiferromagnetic and paramagnetic YNiO3 phases, we show the interplay between spin and structural motifs under pressure and their impact on electronic properties. We successfully describe the insulating nature of both YNiO3 phases and the role of symmetry-breaking motifs in the band gap opening. Moreover, by analyzing the pressure-dependent distribution of local motifs, we show that external pressure can significantly reduce the band gap energy of both phases, originating from the reduction of structural and magnetic disproportionation - change in the distribution of local motifs. These results thus demonstrate that some of the experimental observations in quantum materials (e.g., YNiO3 compounds) can be fully understood without accounting for dynamic correlation.
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Affiliation(s)
- Mateusz Wlazło
- ENSEMBLE3 Centre of Excellence, Wolczynska 133, 01-919 Warsaw, Poland.
| | - Oleksandr I Malyi
- ENSEMBLE3 Centre of Excellence, Wolczynska 133, 01-919 Warsaw, Poland.
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27
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Correlated perovskite nickelates with valence variable rare-earth compositions. J RARE EARTH 2023. [DOI: 10.1016/j.jre.2023.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
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28
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Control of Columnar Grain Microstructure in CSD LaNiO 3 Films. Molecules 2023; 28:molecules28041938. [PMID: 36838926 PMCID: PMC9959992 DOI: 10.3390/molecules28041938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/12/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023] Open
Abstract
Conductive LaNiO3 (LNO) films with an ABO3 perovskite structure deposited on silicon wafers are a promising material for various electronics applications. The creation of a well-defined columnar grain structure in CSD (Chemical Solution Deposition) LNO films is challenging to achieve on an amorphous substrate. Here, we report the formation of columnar grain structure in LNO films deposited on the Si-SiO2 substrate via layer-by-layer deposition with the control of soft-baking temperature and high temperature annealing time of each deposited layer. The columnar structure is controlled not by typical heterogeneous nucleation on the film/substrate interface, but by the crystallites' coalescence during the successive layers' deposition and annealing. The columnar structure of LNO film provides the low resistivity value ρ~700 µOhm·cm and is well suited to lead zirconate-titanate (PZT) film growth with perfect crystalline structure and ferroelectric performance. These results extend the understanding of columnar grain growth via CSD techniques and may enable the development of new materials and devices for distinct applications.
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29
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Structural, electronic, optical and mechanical properties of oxide-based perovskite ABO3 (A = Cu, Nd and B = Sn, Sc): A DFT study. J SOLID STATE CHEM 2023. [DOI: 10.1016/j.jssc.2022.123650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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30
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Room-temperature valence transition in a strain-tuned perovskite oxide. Nat Commun 2022; 13:7774. [PMID: 36522321 PMCID: PMC9755214 DOI: 10.1038/s41467-022-35024-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 11/15/2022] [Indexed: 12/23/2022] Open
Abstract
Cobalt oxides have long been understood to display intriguing phenomena known as spin-state crossovers, where the cobalt ion spin changes vs. temperature, pressure, etc. A very different situation was recently uncovered in praseodymium-containing cobalt oxides, where a first-order coupled spin-state/structural/metal-insulator transition occurs, driven by a remarkable praseodymium valence transition. Such valence transitions, particularly when triggering spin-state and metal-insulator transitions, offer highly appealing functionality, but have thus far been confined to cryogenic temperatures in bulk materials (e.g., 90 K in Pr1-xCaxCoO3). Here, we show that in thin films of the complex perovskite (Pr1-yYy)1-xCaxCoO3-δ, heteroepitaxial strain tuning enables stabilization of valence-driven spin-state/structural/metal-insulator transitions to at least 291 K, i.e., around room temperature. The technological implications of this result are accompanied by fundamental prospects, as complete strain control of the electronic ground state is demonstrated, from ferromagnetic metal under tension to nonmagnetic insulator under compression, thereby exposing a potential novel quantum critical point.
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31
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Park TJ, Selcuk K, Zhang HT, Manna S, Batra R, Wang Q, Yu H, Aadit NA, Sankaranarayanan SKRS, Zhou H, Camsari KY, Ramanathan S. Efficient Probabilistic Computing with Stochastic Perovskite Nickelates. NANO LETTERS 2022; 22:8654-8661. [PMID: 36315005 DOI: 10.1021/acs.nanolett.2c03223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Probabilistic computing has emerged as a viable approach to solve hard optimization problems. Devices with inherent stochasticity can greatly simplify their implementation in electronic hardware. Here, we demonstrate intrinsic stochastic resistance switching controlled via electric fields in perovskite nickelates doped with hydrogen. The ability of hydrogen ions to reside in various metastable configurations in the lattice leads to a distribution of transport gaps. With experimentally characterized p-bits, a shared-synapse p-bit architecture demonstrates highly parallelized and energy-efficient solutions to optimization problems such as integer factorization and Boolean satisfiability. The results introduce perovskite nickelates as scalable potential candidates for probabilistic computing and showcase the potential of light-element dopants in next-generation correlated semiconductors.
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Affiliation(s)
- Tae Joon Park
- School of Materials Engineering, Purdue University, West Lafayette, Indiana47907, United States
| | - Kemal Selcuk
- Department of Electrical and Computer Engineering, University of California, Santa Barbara, Santa Barbara, California93106, United States
| | - Hai-Tian Zhang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana47907, United States
| | - Sukriti Manna
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois60439, United States
- Department of Mechanical and Industrial Engineering, University of Illinois, Chicago, Illinois60607, United States
| | - Rohit Batra
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois60439, United States
| | - Qi Wang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana47907, United States
| | - Haoming Yu
- School of Materials Engineering, Purdue University, West Lafayette, Indiana47907, United States
| | - Navid Anjum Aadit
- Department of Electrical and Computer Engineering, University of California, Santa Barbara, Santa Barbara, California93106, United States
| | - Subramanian K R S Sankaranarayanan
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois60439, United States
- Department of Mechanical and Industrial Engineering, University of Illinois, Chicago, Illinois60607, United States
| | - Hua Zhou
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois60439, United States
| | - Kerem Y Camsari
- Department of Electrical and Computer Engineering, University of California, Santa Barbara, Santa Barbara, California93106, United States
| | - Shriram Ramanathan
- School of Materials Engineering, Purdue University, West Lafayette, Indiana47907, United States
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32
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Amarasinghe DK, Yu H, Rodolakis F, Zhou H, Cao H, Ramanathan S. Electron doping of NdNiO3 thin films using dual chamber CaH2 annealing. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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33
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De Luca G, Spring J, Kaviani M, Jöhr S, Campanini M, Zakharova A, Guillemard C, Herrero-Martin J, Erni R, Piamonteze C, Rossell MD, Aschauer U, Gibert M. Top-Layer Engineering Reshapes Charge Transfer at Polar Oxide Interfaces. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2203071. [PMID: 35841137 DOI: 10.1002/adma.202203071] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 07/12/2022] [Indexed: 06/15/2023]
Abstract
Charge-transfer phenomena at heterointerfaces are a promising pathway to engineer functionalities absent in bulk materials but can also lead to degraded properties in ultrathin films. Mitigating such undesired effects with an interlayer reshapes the interface architecture, restricting its operability. Therefore, developing less-invasive methods to control charge transfer will be beneficial. Here, an appropriate top-interface design allows for remote manipulation of the charge configuration of the buried interface and concurrent restoration of the ferromagnetic trait of the whole film. Double-perovskite insulating ferromagnetic La2 NiMnO6 (LNMO) thin films grown on perovskite oxide substrates are investigated as a model system. An oxygen-vacancy-assisted electronic reconstruction takes place initially at the LNMO polar interfaces. As a result, the magnetic properties of 2-5 unit cell LNMO films are affected beyond dimensionality effects. The introduction of a top electron-acceptor layer redistributes the electron excess and restores the ferromagnetic properties of the ultrathin LNMO films. Such a strategy can be extended to other interfaces and provides an advanced approach to fine-tune the electronic features of complex multilayered heterostructures.
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Affiliation(s)
- Gabriele De Luca
- Department of Physics, University of Zurich, Winterthurerstrasse 190, Zurich, 8057, Switzerland
| | - Jonathan Spring
- Department of Physics, University of Zurich, Winterthurerstrasse 190, Zurich, 8057, Switzerland
| | - Moloud Kaviani
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, Bern, 3012, Switzerland
| | - Simon Jöhr
- Department of Physics, University of Zurich, Winterthurerstrasse 190, Zurich, 8057, Switzerland
| | - Marco Campanini
- Electron Microscopy Center, Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland
| | - Anna Zakharova
- Swiss Light Source, Paul Scherrer Institut, Villigen, 5232, Switzerland
| | - Charles Guillemard
- ALBA Synchrotron Light Source, Carrer de la Llum 2-26, Cerdanyola del Vallès, 08290, Spain
| | - Javier Herrero-Martin
- ALBA Synchrotron Light Source, Carrer de la Llum 2-26, Cerdanyola del Vallès, 08290, Spain
| | - Rolf Erni
- Electron Microscopy Center, Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland
| | | | - Marta D Rossell
- Electron Microscopy Center, Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland
| | - Ulrich Aschauer
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, Bern, 3012, Switzerland
| | - Marta Gibert
- Department of Physics, University of Zurich, Winterthurerstrasse 190, Zurich, 8057, Switzerland
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34
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Aghamiri NA, Hu G, Fali A, Zhang Z, Li J, Balendhran S, Walia S, Sriram S, Edgar JH, Ramanathan S, Alù A, Abate Y. Reconfigurable hyperbolic polaritonics with correlated oxide metasurfaces. Nat Commun 2022; 13:4511. [PMID: 35922424 PMCID: PMC9349304 DOI: 10.1038/s41467-022-32287-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 07/25/2022] [Indexed: 11/13/2022] Open
Abstract
Polaritons enable subwavelength confinement and highly anisotropic flows of light over a wide spectral range, holding the promise for applications in modern nanophotonic and optoelectronic devices. However, to fully realize their practical application potential, facile methods enabling nanoscale active control of polaritons are needed. Here, we introduce a hybrid polaritonic-oxide heterostructure platform consisting of van der Waals crystals, such as hexagonal boron nitride (hBN) or alpha-phase molybdenum trioxide (α-MoO3), transferred on nanoscale oxygen vacancy patterns on the surface of prototypical correlated perovskite oxide, samarium nickel oxide, SmNiO3 (SNO). Using a combination of scanning probe microscopy and infrared nanoimaging techniques, we demonstrate nanoscale reconfigurability of complex hyperbolic phonon polaritons patterned at the nanoscale with high resolution. Hydrogenation and temperature modulation allow spatially localized conductivity modulation of SNO nanoscale patterns, enabling robust real-time modulation and nanoscale reconfiguration of hyperbolic polaritons. Our work paves the way towards nanoscale programmable metasurface engineering for reconfigurable nanophotonic applications. Phonon polaritons in anisotropic van der Waals materials enable subwavelength confinement and controllable flow of light at the nanoscale. Here, the authors exploit correlated perovskite oxide (SmNiO3) substrates with tunable conductivity to obtain real-time modulation and nanoscale reconfiguration of hyperbolic polaritons in hBN and α-MoO3 crystals.
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Affiliation(s)
| | - Guangwei Hu
- Photonics Initiative, Advanced Science Research Center, City University of New York, New York, NY, 10031, USA.,Department of Electrical and Computer Engineering, National University of Singapore, Kent Ridge, Singapore, 117583, Singapore
| | - Alireza Fali
- Department of Physics and Astronomy, University of Georgia, Athens, GA, 30602, USA
| | - Zhen Zhang
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Jiahan Li
- Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, KN, 66506, USA
| | | | - Sumeet Walia
- School of Engineering RMIT University Melbourne, Melbourne, VIC, Australia.,Functional Materials and Microsystems Research Group and the Micro Nano Research Facility RMIT University, Melbourne, VIC, Australia
| | - Sharath Sriram
- Functional Materials and Microsystems Research Group and the Micro Nano Research Facility RMIT University, Melbourne, VIC, Australia.,ARC Centre of Excellence for Transformative Meta-Optical Systems, RMIT University, Melbourne, VIC, Australia
| | - James H Edgar
- Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, KN, 66506, USA
| | - Shriram Ramanathan
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Andrea Alù
- Photonics Initiative, Advanced Science Research Center, City University of New York, New York, NY, 10031, USA.,Physics Program, Graduate Center, City University of New York, New York, NY, 10016, USA
| | - Yohannes Abate
- Department of Physics and Astronomy, University of Georgia, Athens, GA, 30602, USA.
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35
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Cui Y, Ren Y, Luo Z, Ren J, Liu J, Gao Y. Optical/electrical properties of RENiO3 (RE = Pr, Nd, Sm, Gd, Dy, Ho, Er, Y and Lu) with intrinsic point defects: A first-principles study. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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36
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Lu X, Liu J, Zhang N, Xie B, Yang S, Liu W, Jiang Z, Huang Z, Yang Y, Miao J, Li W, Cho S, Liu Z, Liu Z, Shen D. Dimensionality-Controlled Evolution of Charge-Transfer Energy in Digital Nickelates Superlattices. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105864. [PMID: 35603969 PMCID: PMC9313943 DOI: 10.1002/advs.202105864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 04/06/2022] [Indexed: 06/15/2023]
Abstract
Fundamental understanding and control of the electronic structure evolution in rare-earth nickelates is a fascinating and meaningful issue, as well as being helpful to understand the mechanism of recently discovered superconductivity. Here the dimensionality effect on the ground electronic state in high-quality (NdNiO3 ) m /(SrTiO3 )1 superlattices is systematically studied through transport and soft X-ray absorption spectroscopy. The metal-to-insulator transition temperature decreases with the thickness of the NdNiO3 slab decreasing from bulk to 7 unit cells, then increases gradually as m further reduces to 1 unit cell. Spectral evidence demonstrates that the stabilization of insulating phase can be attributed to the increase of the charge-transfer energy between O 2p and Ni 3d bands. The prominent multiplet feature on the Ni L3 edge develops with the decrease of NdNiO3 slab thickness, suggesting the strengthening of the charge disproportionate state under the dimensional confinement. This work provides convincing evidence that dimensionality is an effective knob to modulate the charge-transfer energy and thus the collective ground state in nickelates.
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Affiliation(s)
- Xiangle Lu
- State Key Laboratory of Functional Materials for InformaticsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Jishan Liu
- State Key Laboratory of Functional Materials for InformaticsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Nian Zhang
- State Key Laboratory of Functional Materials for InformaticsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Binping Xie
- Feimion Instruments (Shanghai) Company LimitedShanghai201906China
| | - Shuai Yang
- State Key Laboratory of Functional Materials for InformaticsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Wanling Liu
- State Key Laboratory of Functional Materials for InformaticsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Zhicheng Jiang
- State Key Laboratory of Functional Materials for InformaticsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Zhe Huang
- State Key Laboratory of Functional Materials for InformaticsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Yichen Yang
- State Key Laboratory of Functional Materials for InformaticsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Jin Miao
- State Key Laboratory of Surface PhysicsDepartment of PhysicsFudan UniversityShanghai200433China
| | - Wei Li
- State Key Laboratory of Surface PhysicsDepartment of PhysicsFudan UniversityShanghai200433China
| | - Soohyun Cho
- State Key Laboratory of Functional Materials for InformaticsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Zhengtai Liu
- State Key Laboratory of Functional Materials for InformaticsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Zhonghao Liu
- State Key Laboratory of Functional Materials for InformaticsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Dawei Shen
- State Key Laboratory of Functional Materials for InformaticsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
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37
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Yamagami K, Yoshino H, Yamagishi H, Setoyama H, Tanaka A, Ohtani R, Ohba M, Wadati H. The ligand field in low-crystallinity metal-organic frameworks investigated by soft X-ray core-level absorption spectroscopy. Phys Chem Chem Phys 2022; 24:16680-16686. [PMID: 35766583 DOI: 10.1039/d2cp01415g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ligand field (LF) of transition metal ions is a crucial factor in realizing the mechanism of novel physical and chemical properties. However, the low-crystallinity state, including the amorphous state, precludes the clarification of the electronic structural relationship of transition metal ions using crystallographic techniques, ultraviolet and infrared optical methods, and magnetometry. Here, we demonstrate that soft X-ray 2p → 3d core-level absorption spectroscopy (L2,3-edge XAS) systematically revealed the local 3d electronic states, including in the LF, of nitrogen-coordinated transition-metal ions for low-crystallinity cyanide-bridged metal-organic frameworks (MOFs) M[Ni(CN)4] (MNi; M = Mn, Fe, Co, Ni) and Ni[Pd(CN)4] (NiPd). In NiNi and NiPd, N-coordinated Ni ions with square-planar symmetry exhibit strong orbital hybridization and ligand-to-metal charge transfer effects. In MnNi, FeNi, and CoNi, the correlation between the crystalline electric field splitting in the LF and the transition metal-nitrogen bonding length is revealed using the multiplet LF theory. Regardless of the different local symmetries, our results indicate that L2,3-edge XAS is a powerful tool for gaining element-specific knowledge about the transition-metal ion characterizing the functionality of low-crystallinity MOFs and will be the foundation for an attractive platform, such as adsorption/desorption materials.
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Affiliation(s)
- Kohei Yamagami
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwanoha, Chiba 277-8581, Japan
| | - Haruka Yoshino
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.,Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.,Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - Hirona Yamagishi
- Synchrotron Radiation Center, Ritsumeikan University, Kusatsu, Shiga 525-0058, Japan
| | - Hiroyuki Setoyama
- Kyushu Synchrotron Light Research Center, 8-7 Yayoigaoka, Tosu, Saga, 841-0005, Japan
| | - Arata Tanaka
- Department of Quantum Matter, ADSM, Hiroshima University, Higashihiroshima, Hiroshima 739-8530, Japan
| | - Ryo Ohtani
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Masaaki Ohba
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Hiroki Wadati
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwanoha, Chiba 277-8581, Japan.,Graduate School of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
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38
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Layek S, Greenberg E, Chariton S, Bykov M, Bykova E, Trots DM, Kurnosov AV, Chuvashova I, Ovsyannikov SV, Leonov I, Rozenberg GK. Verwey-Type Charge Ordering and Site-Selective Mott Transition in Fe 4O 5 under Pressure. J Am Chem Soc 2022; 144:10259-10269. [PMID: 35649281 PMCID: PMC9204770 DOI: 10.1021/jacs.2c00895] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Indexed: 11/28/2022]
Abstract
The metal-insulator transition driven by electronic correlations is one of the most fundamental concepts in condensed matter. In mixed-valence compounds, this transition is often accompanied by charge ordering (CO), resulting in the emergence of complex phases and unusual behaviors. The famous example is the archetypal mixed-valence mineral magnetite, Fe3O4, exhibiting a complex charge-ordering below the Verwey transition, whose nature has been a subject of long-time debates. In our study, using high-resolution X-ray diffraction supplemented by resistance measurements and DFT+DMFT calculations, the electronic, magnetic, and structural properties of recently synthesized mixed-valence Fe4O5 are investigated under pressure to ∼100 GPa. Our calculations, consistent with experiment, reveal that at ambient conditions Fe4O5 is a narrow-gap insulator characterized by the original Verwey-type CO. Under pressure Fe4O5 undergoes a series of electronic and magnetic-state transitions with an unusual compressional behavior above ∼50 GPa. A site-dependent collapse of local magnetic moments is followed by the site-selective insulator-to-metal transition at ∼84 GPa, occurring at the octahedral Fe sites. This phase transition is accompanied by a 2+ to 3+ valence change of the prismatic Fe ions and collapse of CO. We provide a microscopic explanation of the complex charge ordering in Fe4O5 which "unifies" it with the behavior of two archetypal examples of charge- or bond-ordered materials, magnetite and rare-earth nickelates (RNiO3). We find that at low temperatures the Verwey-type CO competes with the "trimeron"/"dimeron" charge ordered states, allowing for pressure/temperature tuning of charge ordering. Summing up the available data, we present the pressure-temperature phase diagram of Fe4O5.
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Affiliation(s)
- Samar Layek
- School
of Physics and Astronomy, Tel Aviv University, 69978 Tel Aviv, Israel
- Department
of Physics, School of Engineering, University
of Petroleum and Energy Studies (UPES), Dehradun, Uttarakhand 248007, India
| | - Eran Greenberg
- Center
for Advanced Radiation Sources, University
of Chicago, 5640 South Ellis Avenue, 60637 Chicago, United States
- Applied
Physics Division, Soreq NRC, Yavne, 81800, Israel
| | - Stella Chariton
- Center
for Advanced Radiation Sources, University
of Chicago, 5640 South Ellis Avenue, 60637 Chicago, United States
| | - Maxim Bykov
- Institute
of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Elena Bykova
- Earth
and
Planets Laboratory, Carnegie Institution
for Science, Washington, District of Columbia 20015, United States
- Bayerisches
Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447 Bayreuth, Germany
| | - Dmytro M. Trots
- Bayerisches
Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447 Bayreuth, Germany
| | - Alexander V. Kurnosov
- Bayerisches
Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447 Bayreuth, Germany
| | - Irina Chuvashova
- Harvard
Physics, Jefferson Physical
Lab, 17 Oxford Street, Cambridge, Massachusetts 02138, United States
- Department
of Chemistry and Biochemistry, Florida International
University, 11200 SW
Eighth Street, CP 234, Miami, Florida 33199, United
States
| | - Sergey V. Ovsyannikov
- Bayerisches
Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447 Bayreuth, Germany
| | - Ivan Leonov
- M. N. Miheev
Institute of Metal Physics, Russian Academy
of Sciences, 620108 Yekaterinburg, Russia
- Ural
Federal University, 620002 Yekaterinburg, Russia
- Skolkovo
Institute of Science and Technology, 143026 Moscow, Russia
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39
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Zhu X, Schülli TU, Yang X, Lin T, Hu Y, Cheng N, Fujii H, Ozawa K, Cowie B, Gu Q, Zhou S, Cheng Z, Du Y, Wang L. Epitaxial growth of an atom-thin layer on a LiNi 0.5Mn 1.5O 4 cathode for stable Li-ion battery cycling. Nat Commun 2022; 13:1565. [PMID: 35322022 PMCID: PMC8943144 DOI: 10.1038/s41467-022-28963-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 02/11/2022] [Indexed: 11/09/2022] Open
Abstract
Transition metal dissolution in cathode active material for Li-based batteries is a critical aspect that limits the cycle life of these devices. Although several approaches have been proposed to tackle this issue, this detrimental process is not yet overcome. Here, benefitting from the knowledge developed in the semiconductor research field, we apply an epitaxial method to construct an atomic wetting layer of LaTMO3 (TM = Ni, Mn) on a LiNi0.5Mn1.5O4 cathode material. Experimental measurements and theoretical analyses confirm a Stranski-Krastanov growth, where the strained wetting layer forms under thermodynamic equilibrium, and it is self-limited to monoatomic thickness due to the competition between the surface energy and the elastic energy. Being atomically thin and crystallographically connected to the spinel host lattices, the LaTMO3 wetting layer offers long-term suppression of the transition metal dissolution from the cathode without impacting its dynamics. As a result, the epitaxially-engineered cathode material enables improved cycling stability (a capacity retention of about 77% after 1000 cycles at 290 mA g-1) when tested in combination with a graphitic carbon anode and a LiPF6-based non-aqueous electrolyte solution.
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Affiliation(s)
- Xiaobo Zhu
- Nanomaterials Centre, School of Chemical Engineering, and Australian Institute of Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.,College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, 410114, China
| | - Tobias U Schülli
- Nanomaterials Centre, School of Chemical Engineering, and Australian Institute of Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia. .,ESRF-The European Synchrotron, 38000, Grenoble, France.
| | - Xiaowei Yang
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian, 116024, China
| | - Tongen Lin
- Nanomaterials Centre, School of Chemical Engineering, and Australian Institute of Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Yuxiang Hu
- Nanomaterials Centre, School of Chemical Engineering, and Australian Institute of Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Ningyan Cheng
- Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, North Wollongong, NSW, 2500, Australia
| | - Hiroki Fujii
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba-city, Ibaraki, 305-0047, Japan
| | - Kiyoshi Ozawa
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba-city, Ibaraki, 305-0047, Japan
| | - Bruce Cowie
- Australian Synchrotron, 800 Blackburn Road, Clayton, VIC, 3168, Australia
| | - Qinfen Gu
- Australian Synchrotron, 800 Blackburn Road, Clayton, VIC, 3168, Australia
| | - Si Zhou
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian, 116024, China.,Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, North Wollongong, NSW, 2500, Australia
| | - Zhenxiang Cheng
- Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, North Wollongong, NSW, 2500, Australia
| | - Yi Du
- Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, North Wollongong, NSW, 2500, Australia
| | - Lianzhou Wang
- Nanomaterials Centre, School of Chemical Engineering, and Australian Institute of Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.
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40
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Goodge BH, El Baggari I, Hong SS, Wang Z, Schlom DG, Hwang HY, Kourkoutis LF. Disentangling Coexisting Structural Order Through Phase Lock-In Analysis of Atomic-Resolution STEM Data. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2022; 28:1-8. [PMID: 35190012 DOI: 10.1017/s1431927622000125] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
As a real-space technique, atomic-resolution STEM imaging contains both amplitude and geometric phase information about structural order in materials, with the latter encoding important information about local variations and heterogeneities present in crystalline lattices. Such phase information can be extracted using geometric phase analysis (GPA), a method which has generally focused on spatially mapping elastic strain. Here we demonstrate an alternative phase demodulation technique and its application to reveal complex structural phenomena in correlated quantum materials. As with other methods of image phase analysis, the phase lock-in approach can be implemented to extract detailed information about structural order and disorder, including dislocations and compound defects in crystals. Extending the application of this phase analysis to Fourier components that encode periodic modulations of the crystalline lattice, such as superlattice or secondary frequency peaks, we extract the behavior of multiple distinct order parameters within the same image, yielding insights into not only the crystalline heterogeneity but also subtle emergent order parameters such as antipolar displacements. When applied to atomic-resolution images spanning large (~0.5 × 0.5 μm2) fields of view, this approach enables vivid visualizations of the spatial interplay between various structural orders in novel materials.
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Affiliation(s)
- Berit H Goodge
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY14853, USA
| | | | - Seung Sae Hong
- Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA94305, USA
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA94025, USA
| | - Zhe Wang
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY14853, USA
| | - Darrell G Schlom
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, NY14853, USA
| | - Harold Y Hwang
- Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA94305, USA
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA94025, USA
| | - Lena F Kourkoutis
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, NY14853, USA
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41
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Zeng S, Li C, Chow LE, Cao Y, Zhang Z, Tang CS, Yin X, Lim ZS, Hu J, Yang P, Ariando A. Superconductivity in infinite-layer nickelate La 1-xCa xNiO 2 thin films. SCIENCE ADVANCES 2022; 8:eabl9927. [PMID: 35179968 PMCID: PMC8856608 DOI: 10.1126/sciadv.abl9927] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 12/23/2021] [Indexed: 05/25/2023]
Abstract
We report the observation of superconductivity in infinite-layer Ca-doped LaNiO2 (La1-xCaxNiO2) thin films and construct their phase diagram. Unlike the metal-insulator transition in Nd- and Pr-based nickelates, the undoped and underdoped La1-xCaxNiO2 thin films are entirely insulating from 300 K down to 2 K. A superconducting dome is observed at 0.15 < x < 0.3 with weakly insulating behavior at the overdoped regime. Moreover, the sign of the Hall coefficient RH changes at low temperature for samples with a higher doping level. However, distinct from the Nd- and Pr-based nickelates, the RH-sign-change temperature remains at around 35 K as the doping increases, which begs further theoretical and experimental investigation to reveal the role of the 4f orbital to the (multi)band nature of the superconducting nickelates. Our results also emphasize a notable role of lattice correlation on the multiband structures of the infinite-layer nickelates.
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Affiliation(s)
- Shengwei Zeng
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
| | - Changjian Li
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Lin Er Chow
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
| | - Yu Cao
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore
| | - Zhaoting Zhang
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
| | - Chi Sin Tang
- Singapore Synchrotron Light Source (SSLS), National University of Singapore, Singapore 117603, Singapore
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Singapore 138634, Singapore
| | - Xinmao Yin
- Shanghai Key Laboratory of High Temperature Superconductors, Physics Department, Shanghai University, Shanghai 200444, China
| | - Zhi Shiuh Lim
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
| | - Junxiong Hu
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
| | - Ping Yang
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore
- Singapore Synchrotron Light Source (SSLS), National University of Singapore, Singapore 117603, Singapore
| | - Ariando Ariando
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
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42
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Lee J, Kim GY, Jeong S, Yang M, Kim JW, Cho BG, Choi Y, Kim S, Choi JS, Lee TK, Kim J, Lee DR, Chang SH, Park S, Jung JH, Bark CW, Koo TY, Ryan PJ, Ihm K, Kim S, Choi SY, Kim TH, Lee S. Template Engineering of Metal-to-Insulator Transitions in Epitaxial Bilayer Nickelate Thin Films. ACS APPLIED MATERIALS & INTERFACES 2021; 13:54466-54475. [PMID: 34739229 DOI: 10.1021/acsami.1c13675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Understanding metal-to-insulator phase transitions in solids has been a keystone not only for discovering novel physical phenomena in condensed matter physics but also for achieving scientific breakthroughs in materials science. In this work, we demonstrate that the transport properties (i.e., resistivity and transition temperature) in the metal-to-insulator transitions of perovskite nickelates are tunable via the epitaxial heterojunctions of LaNiO3 and NdNiO3 thin films. A mismatch in the oxygen coordination environment and interfacial octahedral coupling at the oxide heterointerface allows us to realize an exotic phase that is unattainable in the parent compound. With oxygen vacancy formation for strain accommodation, the topmost LaNiO3 layer in LaNiO3/NdNiO3 bilayer thin films is structurally engineered and it electrically undergoes a metal-to-insulator transition that does not appear in metallic LaNiO3. Modification of the NdNiO3 template layer thickness provides an additional knob for tailoring the tilting angles of corner-connected NiO6 octahedra and the linked transport characteristics further. Our approaches can be harnessed to tune physical properties in complex oxides and to realize exotic physical phenomena through oxide thin-film heterostructuring.
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Affiliation(s)
- Jongmin Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Gi-Yeop Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Seyeop Jeong
- Department of Physics, University of Ulsan, Ulsan 44610, Republic of Korea
| | - Mihyun Yang
- Pohang Accelerator Laboratory, Pohang 37673, Republic of Korea
| | - Jong-Woo Kim
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Byeong-Gwan Cho
- Pohang Accelerator Laboratory, Pohang 37673, Republic of Korea
| | - Yongseong Choi
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Sangmo Kim
- Department of Electrical Engineering, Gachon University, Seongnam 13120, Republic of Korea
| | - Jin San Choi
- Department of Physics, University of Ulsan and Energy Harvest-Storage Research Center (EHSRC), Ulsan 44610, Republic of Korea
| | - Tae Kwon Lee
- Department of Physics, Inha University, Incheon 22212, Republic of Korea
| | - Jiwoong Kim
- Department of Physics, Pusan National University, Busan 46241, Republic of Korea
| | - Dong Ryeol Lee
- Department of Physics, Soongsil University, Seoul 06978, Republic of Korea
| | - Seo Hyoung Chang
- Department of Physics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Sungkyun Park
- Department of Physics, Pusan National University, Busan 46241, Republic of Korea
| | - Jong Hoon Jung
- Department of Physics, Inha University, Incheon 22212, Republic of Korea
| | - Chung Wung Bark
- Department of Electrical Engineering, Gachon University, Seongnam 13120, Republic of Korea
| | - Tae-Young Koo
- Pohang Accelerator Laboratory, Pohang 37673, Republic of Korea
| | - Philip J Ryan
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Kyuwook Ihm
- Pohang Accelerator Laboratory, Pohang 37673, Republic of Korea
| | - Sanghoon Kim
- Department of Physics, University of Ulsan, Ulsan 44610, Republic of Korea
| | - Si-Young Choi
- Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Tae Heon Kim
- Department of Physics, University of Ulsan and Energy Harvest-Storage Research Center (EHSRC), Ulsan 44610, Republic of Korea
| | - Sanghan Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
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Prajapati GL, Das S, Rana DS. Emergence of quenched disorder as a dominant control for complex phase diagram of rare-earth nickelates. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:415401. [PMID: 34261053 DOI: 10.1088/1361-648x/ac145d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 07/14/2021] [Indexed: 06/13/2023]
Abstract
Competing interactions in complex materials tend to induce multiple quantum phases of comparable energetics close to the ground state stability. This requires novel strategies and tools to segregate such phases with desired control to manipulate the properties relevant for contemporary technologies. Here, we show 'quenched disorder (QD)' as a predominant control parameter to realize a broad range of the quantum phases of bulkRNiO3(R= rare-earth ion) phase diagram in a LaxEu1-xNiO3compounds by systematic introduction of QD. Using static and terahertz dynamic transport studies on epitaxial thin films, we demonstrate various phases such as Fermi to non-Fermi liquid crossover, bad metallic behavior, quantum criticality, preservation of orbital and charge order symmetry and increased electronic inhomogeneity responsible for Maxwell-Wagner type of dielectric response, etc. The underlying mechanisms are unveiled by the anomalous responses of microscopic quantities such as scattering rate, plasma frequency, spectral weight, effective mass, and disorder. The results and methodology implemented here can be a generic pursuit of disorder based unified control to extract quantum phases submerged in competing energetics in all complex materials.
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Affiliation(s)
- G L Prajapati
- Department of Physics, Indian Institute of Science Education and Research (IISER), Bhopal, India
| | - Sarmistha Das
- Department of Physics, Indian Institute of Science Education and Research (IISER), Bhopal, India
| | - D S Rana
- Department of Physics, Indian Institute of Science Education and Research (IISER), Bhopal, India
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44
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Hart JL, Cha JJ. Seeing Quantum Materials with Cryogenic Transmission Electron Microscopy. NANO LETTERS 2021; 21:5449-5452. [PMID: 34159783 DOI: 10.1021/acs.nanolett.1c02146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- James L Hart
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06511, United States
- Energy Sciences Institute, Yale West Campus, West Haven, Connecticut 06516, United States
| | - Judy J Cha
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06511, United States
- Energy Sciences Institute, Yale West Campus, West Haven, Connecticut 06516, United States
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45
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He C, Ming X, Li Q, Zhu X, Si J, Wen HH. Synthesis and physical properties of perovskite Sm 1-xSr xNiO 3( x= 0, 0.2) and infinite-layer Sm 0.8Sr 0.2NiO 2nickelates. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:265701. [PMID: 33902020 DOI: 10.1088/1361-648x/abfb90] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 04/26/2021] [Indexed: 06/12/2023]
Abstract
Recently, superconductivity at about 9-15 K was discovered in Nd1-xSrxNiO2(Nd-112,x≈ 0.125-0.25) infinite-layer thin films, which has stimulated enormous interests in related rare-earth nickelates. Usually, the first step to synthesize this 112 phase is to fabricate theRNiO3(R-113,R: rare-earth element) phase, however, it was reported that the 113 phase is very difficult to be synthesized successfully due to the formation of unusual Ni3+oxidation state. And the difficulty of preparation is enhanced as the ionic radius of rare-earth element decreases. In this work, we report the synthesis and investigation on multiple physical properties of polycrystalline perovskites Sm1-xSrxNiO3(x= 0, 0.2) in which the ionic radius of Sm3+is smaller than that of Pr3+and Nd3+in related superconducting thin films. The structural and compositional analyses conducted by x-ray diffraction and energy dispersive x-ray spectrum reveal that the samples mainly contain the perovskite phase of Sm1-xSrxNiO3with small amount of NiO impurities. Magnetization and resistivity measurements indicate that the parent phase SmNiO3undergoes a paramagnetic-antiferromagnetic transition at about 224 K on a global insulating background. In contrast, the Sr-doped sample Sm0.8Sr0.2NiO3shows a metallic behavior from 300 K down to about 12 K, while below 12 K the resistivity exhibits a slight logarithmic increase. Meanwhile, from the magnetization curves, we can see that a possible spin-glass state occurs below 12 K in Sm0.8Sr0.2NiO3. Using a soft chemical reduction method, we also obtain the infinite-layer phase Sm0.8Sr0.2NiO2with square NiO2planes. The compound shows an insulating behavior which can be described by the three-dimensional variable-range-hopping model. And superconductivity is still absent in the polycrystalline Sm0.8Sr0.2NiO2.
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Affiliation(s)
- Chengping He
- Center for Superconducting Physics and Materials, National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
| | - Xue Ming
- Center for Superconducting Physics and Materials, National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
| | - Qing Li
- Center for Superconducting Physics and Materials, National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
| | - Xiyu Zhu
- Center for Superconducting Physics and Materials, National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
| | - Jin Si
- Center for Superconducting Physics and Materials, National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
| | - Hai-Hu Wen
- Center for Superconducting Physics and Materials, National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
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Jayakodiarachchi N, Evans PG, Ward CL, Winter CH. Evaluation of Volatility and Thermal Stability in Monomeric and Dimeric Lanthanide(III) Complexes Containing Enaminolate Ligands. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Paul G. Evans
- Department of Materials Science and Engineering, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Cassandra L. Ward
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Charles H. Winter
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
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47
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Li J, Green RJ, Zhang Z, Sutarto R, Sadowski JT, Zhu Z, Zhang G, Zhou D, Sun Y, He F, Ramanathan S, Comin R. Sudden Collapse of Magnetic Order in Oxygen-Deficient Nickelate Films. PHYSICAL REVIEW LETTERS 2021; 126:187602. [PMID: 34018782 DOI: 10.1103/physrevlett.126.187602] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 10/17/2020] [Accepted: 03/17/2021] [Indexed: 06/12/2023]
Abstract
Antiferromagnetic order is a common and robust ground state in the parent (undoped) phase of several strongly correlated electron systems. The progressive weakening of antiferromagnetic correlations upon doping paves the way for a variety of emergent many-electron phenomena including unconventional superconductivity, colossal magnetoresistance, and collective charge-spin-orbital ordering. In this study, we explored the use of oxygen stoichiometry as an alternative pathway to modify the coupled magnetic and electronic ground state in the family of rare earth nickelates (RENiO_{3-x}). Using a combination of x-ray spectroscopy and resonant soft x-ray magnetic scattering, we find that, while oxygen vacancies rapidly alter the electronic configuration within the Ni and O orbital manifolds, antiferromagnetic order is remarkably robust to substantial levels of carrier doping, only to suddenly collapse beyond 0.21 e^{-}/Ni without an accompanying structural transition. Our work demonstrates that ordered magnetism in RENiO_{3-x} is mostly insensitive to carrier doping up to significant levels unseen in other transition-metal oxides. The sudden collapse of ordered magnetism upon oxygen removal may provide a new mechanism for solid-state magnetoionic switching and new applications in antiferromagnetic spintronics.
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Affiliation(s)
- Jiarui Li
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Robert J Green
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5E2
- Stewart Blusson Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4
| | - Zhen Zhang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, USA
| | - Ronny Sutarto
- Canadian Light Source, Saskatoon, Saskatchewan S7N 2V3, Canada
| | - Jerzy T Sadowski
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Zhihai Zhu
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Grace Zhang
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Da Zhou
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Yifei Sun
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, USA
| | - Feizhou He
- Canadian Light Source, Saskatoon, Saskatchewan S7N 2V3, Canada
| | - Shriram Ramanathan
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, USA
| | - Riccardo Comin
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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48
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Mundet B, Domínguez C, Fowlie J, Gibert M, Triscone JM, Alexander DTL. Near-Atomic-Scale Mapping of Electronic Phases in Rare Earth Nickelate Superlattices. NANO LETTERS 2021; 21:2436-2443. [PMID: 33685129 PMCID: PMC7995248 DOI: 10.1021/acs.nanolett.0c04538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 01/29/2021] [Indexed: 06/12/2023]
Abstract
Nanoscale mapping of the distinct electronic phases characterizing the metal-insulator transition displayed by most of the rare-earth nickelate compounds is fundamental for discovering the true nature of this transition and the possible couplings that are established at the interfaces of nickelate-based heterostructures. Here, we demonstrate that this can be accomplished by using scanning transmission electron microscopy in combination with electron energy-loss spectroscopy. By tracking how the O K and Ni L edge fine structures evolve across two different NdNiO3/SmNiO3 superlattices, displaying either one or two metal-insulator transitions depending on the individual layer thickness, we are able to determine the electronic state of each of the individual constituent materials. We further map the spatial configuration associated with their metallic/insulating regions, reaching unit cell spatial resolution. With this, we estimate the width of the metallic/insulating boundaries at the NdNiO3/SmNiO3 interfaces, which is measured to be on the order of four unit cells.
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Affiliation(s)
- Bernat Mundet
- Department
of Quantum Matter Physics, University of
Geneva, 1211 Geneva, Switzerland
- Electron
Spectrometry and Microscopy Laboratory (LSME), Institute of Physics
(IPHYS), École Polytechnique Fédérale
de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Claribel Domínguez
- Department
of Quantum Matter Physics, University of
Geneva, 1211 Geneva, Switzerland
| | - Jennifer Fowlie
- Department
of Quantum Matter Physics, University of
Geneva, 1211 Geneva, Switzerland
| | - Marta Gibert
- Physik-Institut, University of Zurich, 8057 Zurich, Switzerland
| | - Jean-Marc Triscone
- Department
of Quantum Matter Physics, University of
Geneva, 1211 Geneva, Switzerland
| | - Duncan T. L. Alexander
- Electron
Spectrometry and Microscopy Laboratory (LSME), Institute of Physics
(IPHYS), École Polytechnique Fédérale
de Lausanne (EPFL), 1015 Lausanne, Switzerland
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49
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Ji H, Zhou G, Zhang J, Wang X, Xu X. Reversible control of magnetic and transport properties of NdNiO3– epitaxial films. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2020.07.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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50
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Wang L, Yang Z, Yin X, Taylor SD, He X, Tang CS, Bowden ME, Zhao J, Wang J, Liu J, Perea DE, Wangoh L, Wee ATS, Zhou H, Chambers SA, Du Y. Spontaneous phase segregation of Sr 2NiO 3 and SrNi 2O 3 during SrNiO 3 heteroepitaxy. SCIENCE ADVANCES 2021; 7:eabe2866. [PMID: 33674310 PMCID: PMC7935367 DOI: 10.1126/sciadv.abe2866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 01/21/2021] [Indexed: 06/12/2023]
Abstract
Recent discovery of superconductivity in Nd0.8Sr0.2NiO2 motivates the synthesis of other nickelates for providing insights into the origin of high-temperature superconductivity. However, the synthesis of stoichiometric R 1-x Sr x NiO3 thin films over a range of x has proven challenging. Moreover, little is known about the structures and properties of the end member SrNiO3 Here, we show that spontaneous phase segregation occurs while depositing SrNiO3 thin films on perovskite oxide substrates by molecular beam epitaxy. Two coexisting oxygen-deficient Ruddlesden-Popper phases, Sr2NiO3 and SrNi2O3, are formed to balance the stoichiometry and stabilize the energetically preferred Ni2+ cation. Our study sheds light on an unusual oxide thin-film nucleation process driven by the instability in perovskite structured SrNiO3 and the tendency of transition metal cations to form their most stable valence (i.e., Ni2+ in this case). The resulting metastable reduced Ruddlesden-Popper structures offer a testbed for further studying emerging phenomena in nickel-based oxides.
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Affiliation(s)
- Le Wang
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Zhenzhong Yang
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Xinmao Yin
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117542, Singapore
| | - Sandra D Taylor
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Xu He
- Catalan Institute of Nanoscience and Nanotechnology-ICN2, CSIC and BIST, Campus UAB, 08193 Bellaterra, Spain
| | - Chi Sin Tang
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore 117456, Singapore
| | - Mark E Bowden
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Jiali Zhao
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China
| | - Jiaou Wang
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China
| | - Jishan Liu
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354, USA
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences (CAS) , Shanghai 200050, China
| | - Daniel E Perea
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Linda Wangoh
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Andrew T S Wee
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117542, Singapore
| | - Hua Zhou
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Scott A Chambers
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354, USA.
| | - Yingge Du
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354, USA.
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