1
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El Hage R, Humbert V, Rouco V, Sánchez-Santolino G, Lagarrigue A, Seurre K, Carreira SJ, Sander A, Charliac J, Mesoraca S, Trastoy J, Briatico J, Santamaría J, Villegas JE. Bimodal ionic photomemristor based on a high-temperature oxide superconductor/semiconductor junction. Nat Commun 2023; 14:3010. [PMID: 37230971 DOI: 10.1038/s41467-023-38608-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 05/10/2023] [Indexed: 05/27/2023] Open
Abstract
Memristors, a cornerstone for neuromorphic electronics, respond to the history of electrical stimuli by varying their electrical resistance across a continuum of states. Much effort has been recently devoted to developing an analogous response to optical excitation. Here we realize a novel tunnelling photo-memristor whose behaviour is bimodal: its resistance is determined by the dual electrical-optical history. This is obtained in a device of ultimate simplicity: an interface between a high-temperature superconductor and a transparent semiconductor. The exploited mechanism is a reversible nanoscale redox reaction between both materials, whose oxygen content determines the electron tunnelling rate across their interface. The redox reaction is optically driven via an interplay between electrochemistry, photovoltaic effects and photo-assisted ion migration. Besides their fundamental interest, the unveiled electro-optic memory effects have considerable technological potential. Especially in combination with high-temperature superconductivity which, in addition to facilitating low-dissipation connectivity, brings photo-memristive effects to the realm of superconducting electronics.
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Affiliation(s)
- Ralph El Hage
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - Vincent Humbert
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - Victor Rouco
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - Gabriel Sánchez-Santolino
- GFMC, Dpto. Física de Materiales. Universidad de Ciencias Físicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Aurelien Lagarrigue
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - Kevin Seurre
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - Santiago J Carreira
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - Anke Sander
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - Jérôme Charliac
- Laboratoire de Physique des Interfaces et des Couches Minces (UMR7647), CNRS, Ecole Polytechnique, 91128, Palaiseau Cedex, France
| | - Salvatore Mesoraca
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - Juan Trastoy
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - Javier Briatico
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - Jacobo Santamaría
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
- GFMC, Dpto. Física de Materiales. Universidad de Ciencias Físicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Javier E Villegas
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France.
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2
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Wu YM, Suyolcu YE, Kim G, Christiani G, Wang Y, Keimer B, Logvenov G, van Aken PA. Atomic-Scale Tuning of the Charge Distribution by Strain Engineering in Oxide Heterostructures. ACS NANO 2021; 15:16228-16235. [PMID: 34592093 PMCID: PMC8552499 DOI: 10.1021/acsnano.1c05220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 09/28/2021] [Indexed: 06/13/2023]
Abstract
Strain engineering of complex oxide heterostructures has provided routes to explore the influence of the local perturbations to the physical properties of the material. Due to the challenge of disentangling intrinsic and extrinsic effects at oxide interfaces, the combined effects of epitaxial strain and charge transfer mechanisms have been rarely studied. Here, we reveal the local charge distribution in manganite slabs by means of high-resolution electron microscopy and spectroscopy via investigating how the strain locally alters the electronic and magnetic properties of La0.5Sr0.5MnO3-La2CuO4 heterostructures. The charge rearrangement results in two different magnetic phases: an interfacial ferromagnetically reduced layer and an enhanced ferromagnetic metallic region away from the interfaces. Further, the magnitude of the charge redistribution can be controlled via epitaxial strain, which further influences the macroscopic physical properties in a way opposed to strain effects reported on single-phase films. Our work highlights the important role played by epitaxial strain in determining the spatial distribution of microscopic charge and spin interactions in manganites and provides a different perspective for engineering interface properties.
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Affiliation(s)
- Yu-Mi Wu
- Max
Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - Y. Eren Suyolcu
- Max
Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
- Department
of Materials Science and Engineering, Cornell
University, Ithaca, New York 14853, United States
| | - Gideok Kim
- Max
Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - Georg Christiani
- Max
Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - Yi Wang
- Max
Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - Bernhard Keimer
- Max
Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - Gennady Logvenov
- Max
Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - Peter A. van Aken
- Max
Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
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3
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Meng M, Sun Y, Li Y, An Q, Wang Z, Lin Z, Yang F, Zhu X, Gao P, Guo J. Three dimensional band-filling control of complex oxides triggered by interfacial electron transfer. Nat Commun 2021; 12:2447. [PMID: 33907193 PMCID: PMC8079372 DOI: 10.1038/s41467-021-22790-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 03/29/2021] [Indexed: 11/09/2022] Open
Abstract
The d-band-filling of transition metals in complex oxides plays an essential role in determining their structural, electronic and magnetic properties. Traditionally, at the oxide heterointerface, band-filling control has been achieved via electrostatic modification in the structure of field-effect transistors or electron transfer, which is limited to the quasi-two-dimension at the interface. Here we report a three-dimensional (3D) band-filling control by changing the local lattice coordination in a designed oxide heterostructure. At the LaCoO3/LaTiO3 heterointerface, due to the Fermi level mismatch, electrons transfer from LaTiO3 to LaCoO3. This triggers destabilisation of the CoO6 octahedrons, i.e. the formation of lattice configurations with a reduced Co valence. The associated oxygen migration results in the 3D topotactic phase transition of LaCoO3. Tuned by the thickness of LaTiO3, different crystalline phases and band-fillings of Co occur, leading to the emergence of different magnetic ground states.
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Affiliation(s)
- Meng Meng
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - Yuanwei Sun
- International Center for Quantum Materials, and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing, China
| | - Yuehui Li
- International Center for Quantum Materials, and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing, China
| | - Qichang An
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Zhenzhen Wang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Zijian Lin
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Fang Yang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - Xuetao Zhu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China.,Songshan Lake Materials Laboratory, Dongguan, Guangdong, China
| | - Peng Gao
- International Center for Quantum Materials, and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing, China. .,Collaborative Innovation Center of Quantum Matter, Beijing, China.
| | - Jiandong Guo
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China. .,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China. .,Songshan Lake Materials Laboratory, Dongguan, Guangdong, China. .,Beijing Academy of Quantum Information Sciences, Beijing, China.
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4
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Gwee EH, Seeger ZL, Appadoo DRT, Wood BR, Izgorodina EI. Influence of DFT Functionals and Solvation Models on the Prediction of Far-Infrared Spectra of Pt-Based Anticancer Drugs: Why Do Different Complexes Require Different Levels of Theory? ACS OMEGA 2019; 4:5254-5269. [PMID: 31459697 PMCID: PMC6649127 DOI: 10.1021/acsomega.8b03455] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 02/25/2019] [Indexed: 05/06/2023]
Abstract
Computational modeling was applied to far-infrared (FIR) spectra of Pt-based anticancer drugs to study the hydrolysis of these important molecules. Here, we present a study that investigates the influence of different factors-basis sets on non-Pt atoms, relativistic effective core potentials (RECPs) on the Pt atom, density functional theory (DFT) functionals, and solvation models-on the prediction of FIR spectra of two Pt-based anticancer drugs, cisplatin and carboplatin. Geometry optimizations and frequency calculations were performed with a range of functionals (PBE, PBE0, M06-L, and M06-2X), Dunning's correlation-consisted basis sets (VDZ, VTZ, aVDZ, and aVTZ), RECPs (VDZ-pp, VTZ-pp, aVDZ-pp, and aVTZ-pp), and solvation models (IEFPCM, CPCM, and SMD). The best combination of the basis set/DFT functional/solvation model was identified for each anticancer drug by comparing with experimentally available FIR spectra. Different combinations were established for cisplatin and carboplatin, which was rationalized by means of the partial atomic charge scheme, ChelpG, that was utilized to study the charge transfer between the Pt ion and ligands in both cisplatin and carboplatin.
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Affiliation(s)
- Eunice
S. H. Gwee
- Monash
Computational Chemistry Group, School of Chemistry and Centre for Biospectroscopy,
School of Chemistry, Monash University, 17 Rainforest Walk, Clayton, Victoria 3800, Australia
| | - Zoe L. Seeger
- Monash
Computational Chemistry Group, School of Chemistry and Centre for Biospectroscopy,
School of Chemistry, Monash University, 17 Rainforest Walk, Clayton, Victoria 3800, Australia
| | | | - Bayden R. Wood
- Monash
Computational Chemistry Group, School of Chemistry and Centre for Biospectroscopy,
School of Chemistry, Monash University, 17 Rainforest Walk, Clayton, Victoria 3800, Australia
| | - Ekaterina I. Izgorodina
- Monash
Computational Chemistry Group, School of Chemistry and Centre for Biospectroscopy,
School of Chemistry, Monash University, 17 Rainforest Walk, Clayton, Victoria 3800, Australia
- E-mail:
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5
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Pennycook SJ, Li C, Li M, Tang C, Okunishi E, Varela M, Kim YM, Jang JH. Material structure, properties, and dynamics through scanning transmission electron microscopy. J Anal Sci Technol 2018; 9:11. [PMID: 31258949 PMCID: PMC6560782 DOI: 10.1186/s40543-018-0142-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 03/14/2018] [Indexed: 12/03/2022] Open
Abstract
Scanning transmission electron microscopy (STEM) has advanced rapidly in the last decade thanks to the ability to correct the major aberrations of the probe-forming lens. Now, atomic-sized beams are routine, even at accelerating voltages as low as 40 kV, allowing knock-on damage to be minimized in beam sensitive materials. The aberration-corrected probes can contain sufficient current for high-quality, simultaneous, imaging and analysis in multiple modes. Atomic positions can be mapped with picometer precision, revealing ferroelectric domain structures, composition can be mapped by energy-dispersive X-ray spectroscopy (EDX) and electron energy loss spectroscopy (EELS), and charge transfer can be tracked unit cell by unit cell using the EELS fine structure. Furthermore, dynamics of point defects can be investigated through rapid acquisition of multiple image scans. Today STEM has become an indispensable tool for analytical science at the atomic level, providing a whole new level of insights into the complex interplays that control material properties.
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Affiliation(s)
- Stephen J. Pennycook
- Department of Materials Science and Engineering, National University of Singapore, Block EA 07-14, 9 Engineering Drive 1, Singapore, 117575 Singapore
| | - Changjian Li
- Department of Materials Science and Engineering, National University of Singapore, Block EA 07-14, 9 Engineering Drive 1, Singapore, 117575 Singapore
| | - Mengsha Li
- Department of Materials Science and Engineering, National University of Singapore, Block EA 07-14, 9 Engineering Drive 1, Singapore, 117575 Singapore
| | - Chunhua Tang
- Department of Materials Science and Engineering, National University of Singapore, Block EA 07-14, 9 Engineering Drive 1, Singapore, 117575 Singapore
| | | | - Maria Varela
- Dpt. Física de Materiales, Instituto de Magnetismo Aplicado & Instituto Pluridisciplinar, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Young-Min Kim
- Department of Energy Science, Sungkyunkwan University (SKKU), Suwon, 16419 Republic of Korea
| | - Jae Hyuck Jang
- Electron Microscopy Research Center, Korea Basic Science Institute, Daejeon, 34133 South Korea
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6
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Superconductor to Mott insulator transition in YBa2Cu3O7/LaCaMnO3 heterostructures. Sci Rep 2016; 6:33184. [PMID: 27627855 PMCID: PMC5024130 DOI: 10.1038/srep33184] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 08/15/2016] [Indexed: 11/08/2022] Open
Abstract
The superconductor-to-insulator transition (SIT) induced by means such as external magnetic fields, disorder or spatial confinement is a vivid illustration of a quantum phase transition dramatically affecting the superconducting order parameter. In pursuit of a new realization of the SIT by interfacial charge transfer, we developed extremely thin superlattices composed of high Tc superconductor YBa2Cu3O7 (YBCO) and colossal magnetoresistance ferromagnet La0.67Ca0.33MnO3 (LCMO). By using linearly polarized resonant X-ray absorption spectroscopy and magnetic circular dichroism, combined with hard X-ray photoelectron spectroscopy, we derived a complete picture of the interfacial carrier doping in cuprate and manganite atomic layers, leading to the transition from superconducting to an unusual Mott insulating state emerging with the increase of LCMO layer thickness. In addition, contrary to the common perception that only transition metal ions may respond to the charge transfer process, we found that charge is also actively compensated by rare-earth and alkaline-earth metal ions of the interface. Such deterministic control of Tc by pure electronic doping without any hindering effects of chemical substitution is another promising route to disentangle the role of disorder on the pseudo-gap and charge density wave phases of underdoped cuprates.
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7
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Huang SW, Wray LA, Jeng HT, Tra VT, Lee JM, Langner MC, Chen JM, Roy S, Chu YH, Schoenlein RW, Chuang YD, Lin JY. Selective interlayer ferromagnetic coupling between the Cu spins in YBa2Cu3O7-x grown on top of La0.7Ca0.3MnO3. Sci Rep 2015; 5:16690. [PMID: 26573394 PMCID: PMC4648077 DOI: 10.1038/srep16690] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 10/19/2015] [Indexed: 11/09/2022] Open
Abstract
Studies to date on ferromagnet/d-wave superconductor heterostructures focus mainly on the effects at or near the interfaces while the response of bulk properties to heterostructuring is overlooked. Here we use resonant soft x-ray scattering spectroscopy to reveal a novel c-axis ferromagnetic coupling between the in-plane Cu spins in YBa2Cu3O7-x (YBCO) superconductor when it is grown on top of ferromagnetic La0.7Ca0.3MnO3 (LCMO) manganite layer. This coupling, present in both normal and superconducting states of YBCO, is sensitive to the interfacial termination such that it is only observed in bilayers with MnO2 but not with La0.7Ca0.3O interfacial termination. Such contrasting behaviors, we propose, are due to distinct energetic of CuO chain and CuO2 plane at the La0.7Ca0.3O and MnO2 terminated interfaces respectively, therefore influencing the transfer of spin-polarized electrons from manganite to cuprate differently. Our findings suggest that the superconducting/ferromagnetic bilayers with proper interfacial engineering can be good candidates for searching the theorized Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) state in cuprates and studying the competing quantum orders in highly correlated electron systems.
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Affiliation(s)
- S W Huang
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.,Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.,MAX IV Laboratory, Lund University, P. O. Box 118, 22100 Lund, Sweden
| | - L Andrew Wray
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.,Department of Physics, New York University, New York, 10003, USA.,Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Horng-Tay Jeng
- Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan.,Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
| | - V T Tra
- Institute of Physics, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - J M Lee
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - M C Langner
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - J M Chen
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - S Roy
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Y H Chu
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - R W Schoenlein
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Y-D Chuang
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - J-Y Lin
- Institute of Physics, National Chiao Tung University, Hsinchu 30010, Taiwan.,Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
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8
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Rocci M, Azpeitia J, Trastoy J, Perez-Muñoz A, Cabero M, Luccas RF, Munuera C, Mompean FJ, Garcia-Hernandez M, Bouzehouane K, Sefrioui Z, Leon C, Rivera-Calzada A, Villegas JE, Santamaria J. Proximity Driven Commensurate Pinning in YBa2Cu3O7 through All-Oxide Magnetic Nanostructures. NANO LETTERS 2015; 15:7526-7531. [PMID: 26441137 DOI: 10.1021/acs.nanolett.5b03261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The design of artificial vortex pinning landscapes is a major goal toward large scale applications of cuprate superconductors. Although disordered nanometric inclusions have shown to modify their vortex phase diagram and to produce enhancements of the critical current ( MacManus-Driscoll , J. L. ; Foltyn , S. R. ; Jia , Q. X. ; Wang , H. ; Serquis , A. ; Civale , L. ; Maiorov , B. ; Hawley , M. E. ; Maley , M. P. ; Peterson , D. E. Nat. Mater. 2004 , 3 , 439 - 443 and Yamada , Y. ; Takahashi , K. ; Kobayashi , H. ; Konishi , M. ; Watanabe , T. ; Ibi , A. ; Muroga , T. ; Miyata , S. ; Kato , T. ; Hirayama , T. ; Shiohara , Y. Appl. Phys. Lett. 2005 , 87 , 1 - 3 ), the effect of ordered oxide nanostructures remains essentially unexplored. This is due to the very small nanostructure size imposed by the short coherence length, and to the technological difficulties in the nanofabrication process. Yet, the novel phenomena occurring at oxide interfaces open a wide spectrum of technological opportunities to interplay with the superconductivity in cuprates. Here, we show that the unusual long-range suppression of the superconductivity occurring at the interface between manganites and cuprates affects vortex nucleation and provides a novel vortex pinning mechanism. In particular, we show evidence of commensurate pinning in YBCO films with ordered arrays of LCMO ferromagnetic nanodots. Vortex pinning results from the proximity induced reduction of the condensation energy at the vicinity of the magnetic nanodots, and yields an enhanced friction between the nanodot array and the moving vortex lattice in the liquid phase. This result shows that all-oxide ordered nanostructures constitute a powerful, new route for the artificial manipulation of vortex matter in cuprates.
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Affiliation(s)
- M Rocci
- GFMC, Dpto. Fisica Aplicada III, Univ. Complutense Madrid , 28040 Madrid, Spain
- Unidad Asociada Laboratorio de Heteroestructuras con Aplicación en Espintrónica" UCM-CSIC , 28049 Madrid, Spain
| | - J Azpeitia
- Instituto de Ciencia de Materiales de Madrid , 28049 Madrid, Spain
- Unidad Asociada Laboratorio de Heteroestructuras con Aplicación en Espintrónica" UCM-CSIC , 28049 Madrid, Spain
| | - J Trastoy
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université , Paris-Saclay, 91767, Palaiseau, France
- Université Paris Sud , 91407 Orsay, France
| | - A Perez-Muñoz
- GFMC, Dpto. Fisica Aplicada III, Univ. Complutense Madrid , 28040 Madrid, Spain
- Unidad Asociada Laboratorio de Heteroestructuras con Aplicación en Espintrónica" UCM-CSIC , 28049 Madrid, Spain
| | - M Cabero
- GFMC, Dpto. Fisica Aplicada III, Univ. Complutense Madrid , 28040 Madrid, Spain
- Unidad Asociada Laboratorio de Heteroestructuras con Aplicación en Espintrónica" UCM-CSIC , 28049 Madrid, Spain
| | - R F Luccas
- Instituto de Ciencia de Materiales de Madrid , 28049 Madrid, Spain
- Unidad Asociada Laboratorio de Heteroestructuras con Aplicación en Espintrónica" UCM-CSIC , 28049 Madrid, Spain
| | - C Munuera
- Instituto de Ciencia de Materiales de Madrid , 28049 Madrid, Spain
- Unidad Asociada Laboratorio de Heteroestructuras con Aplicación en Espintrónica" UCM-CSIC , 28049 Madrid, Spain
| | - F J Mompean
- Instituto de Ciencia de Materiales de Madrid , 28049 Madrid, Spain
- Unidad Asociada Laboratorio de Heteroestructuras con Aplicación en Espintrónica" UCM-CSIC , 28049 Madrid, Spain
| | - M Garcia-Hernandez
- Instituto de Ciencia de Materiales de Madrid , 28049 Madrid, Spain
- Unidad Asociada Laboratorio de Heteroestructuras con Aplicación en Espintrónica" UCM-CSIC , 28049 Madrid, Spain
| | - K Bouzehouane
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université , Paris-Saclay, 91767, Palaiseau, France
- Université Paris Sud , 91407 Orsay, France
| | - Z Sefrioui
- GFMC, Dpto. Fisica Aplicada III, Univ. Complutense Madrid , 28040 Madrid, Spain
- Unidad Asociada Laboratorio de Heteroestructuras con Aplicación en Espintrónica" UCM-CSIC , 28049 Madrid, Spain
| | - C Leon
- GFMC, Dpto. Fisica Aplicada III, Univ. Complutense Madrid , 28040 Madrid, Spain
- Unidad Asociada Laboratorio de Heteroestructuras con Aplicación en Espintrónica" UCM-CSIC , 28049 Madrid, Spain
| | - A Rivera-Calzada
- GFMC, Dpto. Fisica Aplicada III, Univ. Complutense Madrid , 28040 Madrid, Spain
- Unidad Asociada Laboratorio de Heteroestructuras con Aplicación en Espintrónica" UCM-CSIC , 28049 Madrid, Spain
| | - J E Villegas
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université , Paris-Saclay, 91767, Palaiseau, France
- Université Paris Sud , 91407 Orsay, France
| | - J Santamaria
- GFMC, Dpto. Fisica Aplicada III, Univ. Complutense Madrid , 28040 Madrid, Spain
- Unidad Asociada Laboratorio de Heteroestructuras con Aplicación en Espintrónica" UCM-CSIC , 28049 Madrid, Spain
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9
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Ubiquitous long-range antiferromagnetic coupling across the interface between superconducting and ferromagnetic oxides. Nat Commun 2014; 5:5626. [PMID: 25418631 DOI: 10.1038/ncomms6626] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Accepted: 10/22/2014] [Indexed: 11/08/2022] Open
Abstract
The so-called proximity effect is the manifestation, across an interface, of the systematic competition between magnetic order and superconductivity. This phenomenon has been well documented and understood for conventional superconductors coupled with metallic ferromagnets; however it is still less known for oxide materials, where much higher critical temperatures are offered by copper oxide-based superconductors. Here we show that, even in the absence of direct Cu-O-Mn covalent bonding, the interfacial CuO2 planes of superconducting La(1.85)Sr(0.15)CuO(4) thin films develop weak ferromagnetism associated to the charge transfer of spin-polarised electrons from the La(0.66)Sr(0.33)MnO(3) ferromagnet. Theoretical modelling confirms that this effect is general to all cuprate/manganite heterostructures and the presence of direct bonding only affects the strength of the coupling. The Dzyaloshinskii-Moriya interaction, also at the origin of the weak ferromagnetism of bulk cuprates, propagates the magnetisation from the interface CuO2 planes into the superconductor, eventually depressing its critical temperature.
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