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Su M, Zhang Y, Liu G, Jiang H, Lin Y, Ding Y, Wu Q, Wei W, Wang X, Wu T, Tao K, Chen C, Xie E, Zhang Z. Optimizing Surface State Electrons of Topological Semi-Metal by Atomic Doping for Enhanced Hydrogen Evolution Reaction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2403710. [PMID: 38884192 DOI: 10.1002/smll.202403710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Indexed: 06/18/2024]
Abstract
Topological materials carrying topological surface states (TSSs) have extraordinary carrier mobility and robustness, which provide a new platform for searching for efficient hydrogen evolution reaction (HER) electrocatalysts. However, the majority of these TSSs originate from the sp band of topological quantum catalysts rather than the d band. Here, based on the density functional theory calculation, it is reported a topological semimetal Pd3Sn carrying TSSs mainly derived from d orbital and proposed that optimizing surface state electrons of Pd3Sn by introduction heteroatoms (Ni) can promote hybridization between hydrogen atoms and electrons, thereby reducing the Gibbs free energy (ΔGH) of adsorbed hydrogen and improving its HER performance. Moreover, this is well verified by electrocatalytic experiment results, the Ni-doped Pd3Sn (Ni0.1Pd2.9Sn) show much lower overpotential (-29 mV vs RHE) and Tafel slope (17 mV dec-1) than Pd3Sn (-39 mV vs RHE, 25 mV dec-1) at a current density of 10 mA cm-2. Significantly, the Ni0.1Pd2.9Sn nanoparticles exhibit excellent stability for HER. The electrocatalytic activity of Ni0.1Pd2.9Sn nanoparticles is superior to that of commercial Pt. This work provides an accurate guide for manipulating surface state electrons to improve the HER performance of catalysts.
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Affiliation(s)
- Meixia Su
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- School of Science, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Yuhao Zhang
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- School of Science, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Guo Liu
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- School of Science, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Haiqing Jiang
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- School of Science, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Yuan Lin
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- School of Science, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Yan Ding
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- School of Science, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Qingfeng Wu
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- School of Science, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Wei Wei
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- School of Science, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Xinge Wang
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- School of Science, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Tianyu Wu
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- School of Science, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Kun Tao
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- School of Science, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Changcheng Chen
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- School of Science, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Erqing Xie
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- School of Science, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Zhenxing Zhang
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- School of Science, Xi'an University of Architecture and Technology, Xi'an, 710055, China
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2
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Sie EJ, Othman MAK, Nyby CM, Pemmaraju D, Garcia CAC, Wang Y, Guzelturk B, Xia C, Xiao J, Poletayev A, Ofori-Okai BK, Hoffmann MC, Park S, Shen X, Yang J, Li R, Reid AH, Weathersby S, Muscher P, Finney N, Rhodes D, Balicas L, Nanni E, Hone J, Chueh W, Devereaux TP, Narang P, Heinz TF, Wang X, Lindenberg AM. Giant Terahertz Birefringence in an Ultrathin Anisotropic Semimetal. NANO LETTERS 2024; 24:6031-6037. [PMID: 38717626 DOI: 10.1021/acs.nanolett.4c00758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
Manipulating the polarization of light at the nanoscale is key to the development of next-generation optoelectronic devices. This is typically done via waveplates using optically anisotropic crystals, with thicknesses on the order of the wavelength. Here, using a novel ultrafast electron-beam-based technique sensitive to transient near fields at THz frequencies, we observe a giant anisotropy in the linear optical response in the semimetal WTe2 and demonstrate that one can tune the THz polarization using a 50 nm thick film, acting as a broadband wave plate with thickness 3 orders of magnitude smaller than the wavelength. The observed circular deflections of the electron beam are consistent with simulations tracking the trajectory of the electron beam in the near field of the THz pulse. This finding offers a promising approach to enable atomically thin THz polarization control using anisotropic semimetals and defines new approaches for characterizing THz near-field optical response at far-subwavelength length scales.
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Affiliation(s)
- Edbert J Sie
- Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, United States
- Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Mohamed A K Othman
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Clara M Nyby
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Das Pemmaraju
- Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Christina A C Garcia
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge Massachusetts 02138, United States
| | - Yaxian Wang
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge Massachusetts 02138, United States
| | - Burak Guzelturk
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Chenyi Xia
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Jun Xiao
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Andrey Poletayev
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | | | - Matthias C Hoffmann
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Suji Park
- Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Xiaozhe Shen
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Jie Yang
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Renkai Li
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Alexander H Reid
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Stephen Weathersby
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Philipp Muscher
- Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Nathan Finney
- Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States
| | - Daniel Rhodes
- Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States
| | - Luis Balicas
- National High Magnetic Field Laboratory and Department of Physics, Florida State University, Tallahassee, Florida 32310, United States
| | - Emilio Nanni
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - James Hone
- Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States
| | - William Chueh
- Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
- Department of Applied Physics, Stanford University, Stanford, California 94305, United States
| | - Thomas P Devereaux
- Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Prineha Narang
- College of Letters and Science, University of California, Los Angeles, California 90095, United States
| | - Tony F Heinz
- Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
- Department of Applied Physics, Stanford University, Stanford, California 94305, United States
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Xijie Wang
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
- Faculty of Physics, University of Duisburg-Essen, 47057 Duisburg, Germany
- Department of Physics, University of Dortmund, 44221 Dortmund, Germany
| | - Aaron M Lindenberg
- Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
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3
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Wang X, Yi C, Felser C. Chiral Quantum Materials: When Chemistry Meets Physics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2308746. [PMID: 38126622 DOI: 10.1002/adma.202308746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 12/01/2023] [Indexed: 12/23/2023]
Abstract
Chirality is a fundamental property of nature with relevance in biochemistry and physics, particularly in the field of catalysis. Understanding the mechanisms underlying chirality transfer is crucial for advancing the knowledge of chiral-related catalysis. Chiral quantum materials with intriguing chirality-dependent electronic properties, such as spin-orbital coupling (SOC) and exotic spin/orbital angular momentum (SAM/OAM), open novel avenues for linking solid-state topologies with chiral catalysis. In this review, the growth of topological homochiral crystals (THCs) is described, and their applications in heterogeneous catalysis, including hydrogen evolution reaction (HER), oxygen electrocatalysis, and asymmetric catalysis are summarized. A possible link between chirality-dependent electronic properties and heterogeneous catalysis is discussed. Finally, existing challenges in this field are highlighted, and a brief outlook on the impact of THCs on the overarching chemical-physical research is presented.
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Affiliation(s)
- Xia Wang
- Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany
| | - Changjiang Yi
- Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany
| | - Claudia Felser
- Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany
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4
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Andriushin ND, Sukhanov AS, Korshunov AN, Pavlovskii MS, Rahn MC, Nikitin SE. Phonon Topology and Winding of Spectral Weight in Graphite. PHYSICAL REVIEW LETTERS 2023; 131:246601. [PMID: 38181154 DOI: 10.1103/physrevlett.131.246601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 10/19/2023] [Indexed: 01/07/2024]
Abstract
The topology of electronic and phonon band structures of graphene is well studied and known to exhibit a Dirac cone at the K point of the Brillouin zone. Here, we applied inelastic x-ray scattering (IXS) along with ab initio calculations to investigate phonon topology in graphite, the 3D analog of graphene. We identified a pair of modes that form a very weakly gapped linear anticrossing at the K point that can be essentially viewed as a Dirac cone approximant. The IXS intensity in the vicinity of the quasi-Dirac point reveals a harmonic modulation of the phonon spectral weight above and below the Dirac energy, which was previously proposed as an experimental fingerprint of the nontrivial topology. We illustrate how the topological winding of IXS intensity can be understood in terms of atomic displacements and highlight that the intensity winding is not in fact sensitive in telling quasi- and true Dirac points apart.
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Affiliation(s)
- N D Andriushin
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, D-01069 Dresden, Germany
| | - A S Sukhanov
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, D-01069 Dresden, Germany
| | - A N Korshunov
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, D-01069 Dresden, Germany
- Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
- Quantum Criticality and Dynamics Group, Paul Scherrer Institut, CH-5232 Villigen-PSI, Switzerland
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, CH-5232 Villigen-PSI, Switzerland
| | - M S Pavlovskii
- Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
| | - M C Rahn
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, D-01069 Dresden, Germany
| | - S E Nikitin
- Quantum Criticality and Dynamics Group, Paul Scherrer Institut, CH-5232 Villigen-PSI, Switzerland
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, CH-5232 Villigen-PSI, Switzerland
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5
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Zhou X. Flat bands find another dimension for exotic physical phases. Nature 2023; 623:259-260. [PMID: 37938698 DOI: 10.1038/d41586-023-03286-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
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6
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Han J, Cheng R, Liu L, Ohno H, Fukami S. Coherent antiferromagnetic spintronics. NATURE MATERIALS 2023; 22:684-695. [PMID: 36941390 DOI: 10.1038/s41563-023-01492-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 01/25/2023] [Indexed: 06/03/2023]
Abstract
Antiferromagnets have attracted extensive interest as a material platform in spintronics. So far, antiferromagnet-enabled spin-orbitronics, spin-transfer electronics and spin caloritronics have formed the bases of antiferromagnetic spintronics. Spin transport and manipulation based on coherent antiferromagnetic dynamics have recently emerged, pushing the developing field of antiferromagnetic spintronics towards a new stage distinguished by the features of spin coherence. In this Review, we categorize and analyse the critical effects that harness the coherence of antiferromagnets for spintronic applications, including spin pumping from monochromatic antiferromagnetic magnons, spin transmission via phase-correlated antiferromagnetic magnons, electrically induced spin rotation and ultrafast spin-orbit effects in antiferromagnets. We also discuss future opportunities in research and applications stimulated by the principles, materials and phenomena of coherent antiferromagnetic spintronics.
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Affiliation(s)
- Jiahao Han
- Research Institute of Electrical Communication, Tohoku University, Sendai, Japan.
| | - Ran Cheng
- Department of Electrical and Computer Engineering, University of California Riverside, Riverside, CA, USA
- Department of Physics and Astronomy, University of California Riverside, Riverside, CA, USA
| | - Luqiao Liu
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Hideo Ohno
- Research Institute of Electrical Communication, Tohoku University, Sendai, Japan
- Center for Science and Innovation in Spintronics, Tohoku University, Sendai, Japan
- Center for Innovative Integrated Electronic Systems, Tohoku University, Sendai, Japan
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai, Japan
| | - Shunsuke Fukami
- Research Institute of Electrical Communication, Tohoku University, Sendai, Japan.
- Center for Science and Innovation in Spintronics, Tohoku University, Sendai, Japan.
- Center for Innovative Integrated Electronic Systems, Tohoku University, Sendai, Japan.
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai, Japan.
- Inamori Research Institute of Science, Kyoto, Japan.
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7
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Chen CJ, Chao YC, Lin YH, Zhuang YH, Lai YM, Huang ST, MacDonald AH, Shih CK, Wang BY, Su JJ, Hsu PJ. Single-Atomic-Layer Stanene on Ferromagnetic Co Nanoislands with Topological Band Structures. ACS NANO 2023; 17:7456-7465. [PMID: 37014733 DOI: 10.1021/acsnano.2c12144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Introducing magnetism to two-dimensional topological insulators is a central issue in the pursuit of magnetic topological materials in low dimensionality. By means of low-temperature growth at 80 K, we succeeded in fabricating a monolayer stanene on Co/Cu(111) and resolving ferromagnetic spin contrast by field-dependent spin-polarized scanning tunneling microscopy (SP-STM). Increases of both remanence to saturation magnetization ratio (Mr/Ms) and coercive field (Hc) due to an enhanced perpendicular magnetic anisotropy (PMA) are further identified by out-of-plane magneto-optical Kerr effect (MOKE). In addition to ultraflat stanene fully relaxed on bilayer Co/Cu(111) from density functional theory (DFT), characteristic topological properties including an in-plane s-p band inversion and a spin-orbit coupling (SOC) induced gap about 0.25 eV at the Γ̅ point have also been verified in the Sn-projected band structure. Interfacial coupling of single-atomic-layer stanene with ferromagnetic Co biatomic layers allows topological band features to coexist with ferromagnetism, facilitating a conceptual design of atomically thin magnetic topological heterostructures.
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Affiliation(s)
- Chia-Ju Chen
- Department of Physics, National Tsing Hua University, 300044 Hsinchu, Taiwan
| | - Yung-Chun Chao
- Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu, 300093, Taiwan
| | - Yen-Hui Lin
- Department of Physics, National Tsing Hua University, 300044 Hsinchu, Taiwan
| | - Yi-Hao Zhuang
- Department of Physics, National Tsing Hua University, 300044 Hsinchu, Taiwan
| | - Yen-Ming Lai
- Department of Physics, National Changhua University of Education, Changhua 500, Taiwan
| | - Shih-Tang Huang
- Department of Physics, National Tsing Hua University, 300044 Hsinchu, Taiwan
| | - Allan H MacDonald
- Department of Physics, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Chih-Kang Shih
- Department of Physics, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Bo-Yao Wang
- Department of Physics, National Changhua University of Education, Changhua 500, Taiwan
| | - Jung-Jung Su
- Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu, 300093, Taiwan
| | - Pin-Jui Hsu
- Department of Physics, National Tsing Hua University, 300044 Hsinchu, Taiwan
- Center for Quantum Technology, National Tsing Hua University, Hsinchu 300044, Taiwan
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8
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Bake A, Zhang Q, Ho CS, Causer GL, Zhao W, Yue Z, Nguyen A, Akhgar G, Karel J, Mitchell D, Pastuovic Z, Lewis R, Cole JH, Nancarrow M, Valanoor N, Wang X, Cortie D. Top-down patterning of topological surface and edge states using a focused ion beam. Nat Commun 2023; 14:1693. [PMID: 36973266 PMCID: PMC10042877 DOI: 10.1038/s41467-023-37102-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 02/27/2023] [Indexed: 03/29/2023] Open
Abstract
AbstractThe conducting boundary states of topological insulators appear at an interface where the characteristic invariant ℤ2 switches from 1 to 0. These states offer prospects for quantum electronics; however, a method is needed to spatially-control ℤ2 to pattern conducting channels. It is shown that modifying Sb2Te3 single-crystal surfaces with an ion beam switches the topological insulator into an amorphous state exhibiting negligible bulk and surface conductivity. This is attributed to a transition from ℤ2 = 1 → ℤ2 = 0 at a threshold disorder strength. This observation is supported by density functional theory and model Hamiltonian calculations. Here we show that this ion-beam treatment allows for inverse lithography to pattern arrays of topological surfaces, edges and corners which are the building blocks of topological electronics.
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9
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Luo J, Li S, Ye Z, Xu R, Yan H, Zhang J, Ye G, Chen L, Hu D, Teng X, Smith WA, Yakobson BI, Dai P, Nevidomskyy AH, He R, Zhu H. Evidence for Topological Magnon-Phonon Hybridization in a 2D Antiferromagnet down to the Monolayer Limit. NANO LETTERS 2023; 23:2023-2030. [PMID: 36797055 DOI: 10.1021/acs.nanolett.3c00351] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Topological phonons and magnons potentially enable low-loss, quantum coherent, and chiral transport of information and energy at the atomic scale. Van der Waals magnetic materials are promising to realize such states due to their recently discovered strong interactions among the electronic, spin, and lattice degrees of freedom. Here, we report the first observation of coherent hybridization of magnons and phonons in monolayer antiferromagnet FePSe3 by cavity-enhanced magneto-Raman spectroscopy. The robust magnon-phonon cooperativity in the 2D limit occurs even in zero magnetic field, which enables nontrivial band inversion between longitudinal and transverse optical phonons caused by the strong coupling with magnons. The spin and lattice symmetry theoretically guarantee magnetic-field-controlled topological phase transition, verified by nonzero Chern numbers calculated from the coupled spin-lattice model. The 2D topological magnon-phonon hybridization potentially offers a new route toward quantum phononics and magnonics with an ultrasmall footprint.
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Affiliation(s)
- Jiaming Luo
- Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States
- Applied Physics Graduate Program, Rice University, Houston, Texas 77005, United States
| | - Shuyi Li
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
| | - Zhipeng Ye
- Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Rui Xu
- Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States
| | - Han Yan
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
| | - Junjie Zhang
- Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States
| | - Gaihua Ye
- Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Lebing Chen
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
| | - Ding Hu
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
| | - Xiaokun Teng
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
| | - William A Smith
- Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States
| | - Boris I Yakobson
- Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States
| | - Pengcheng Dai
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
| | - Andriy H Nevidomskyy
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States
| | - Rui He
- Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Hanyu Zhu
- Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States
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10
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First Principles Computation of New Topological B2X2Zn (X = Ir, Rh, Co) Compounds. J 2023. [DOI: 10.3390/j6010011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023] Open
Abstract
Recent attempts at searching for new materials have revealed a large class of materials that show topological behaviors with unusual physical properties and potential applications leading to enthralling discoveries both theoretically and experimentally. We computationally predict new three-dimensional topological compounds of space group 139(I/4mmm). After conducting a full volume optimization process by allowing the rearrangement of atomic positions and lattice parameters, the first-principles calculation with a generalized gradient approximation is utilized to identify multiple Dirac-type crossings around X and P symmetric points near Fermi energy. Importantly, the band inversion at point P is recognized. Further, we investigate the compound for topological crystalline insulating behavior by conducting surface state calculation and by investigating gapping behavior by increasing lattice parameters. Additionally, we perform formation energy, elastic properties, and phonon modes calculations to verify the structural, mechanical, and dynamical stability of the compounds. Therefore, we suggest compounds for further investigation and experimental realization.
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11
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Giant Phonon Anomaly in Topological Nodal-Line Semimetals. FUNDAMENTAL RESEARCH 2022. [DOI: 10.1016/j.fmre.2022.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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12
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Kim H, Ok JM, Cha S, Jang BG, Kwon CI, Kohama Y, Kindo K, Cho WJ, Choi ES, Jo YJ, Kang W, Shim JH, Kim KS, Kim JS. Quantum transport evidence of isolated topological nodal-line fermions. Nat Commun 2022; 13:7188. [PMID: 36418308 PMCID: PMC9684491 DOI: 10.1038/s41467-022-34845-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 11/08/2022] [Indexed: 11/25/2022] Open
Abstract
Anomalous transport responses, dictated by the nontrivial band topology, are the key for application of topological materials to advanced electronics and spintronics. One promising platform is topological nodal-line semimetals due to their rich topology and exotic physical properties. However, their transport signatures have often been masked by the complexity in band crossings or the coexisting topologically trivial states. Here we show that, in slightly hole-doped SrAs3, the single-loop nodal-line states are well-isolated from the trivial states and entirely determine the transport responses. The characteristic torus-shaped Fermi surface and the associated encircling Berry flux of nodal-line fermions are clearly manifested by quantum oscillations of the magnetotransport properties and the quantum interference effect resulting in the two-dimensional behaviors of weak antilocalization. These unique quantum transport signatures make the isolated nodal-line fermions in SrAs3 desirable for novel devices based on their topological charge and spin transport.
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Affiliation(s)
- Hoil Kim
- grid.410720.00000 0004 1784 4496Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, 37673 Korea ,grid.49100.3c0000 0001 0742 4007Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 37673 Korea
| | - Jong Mok Ok
- grid.410720.00000 0004 1784 4496Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, 37673 Korea ,grid.49100.3c0000 0001 0742 4007Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 37673 Korea ,grid.262229.f0000 0001 0719 8572Department of Physics, Pusan National University, Busan, 46241 Korea
| | - Seyeong Cha
- grid.15444.300000 0004 0470 5454Department of Physics, Yonsei University, Seoul, 03722 Korea
| | - Bo Gyu Jang
- grid.49100.3c0000 0001 0742 4007Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673 Korea
| | - Chang Il Kwon
- grid.410720.00000 0004 1784 4496Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, 37673 Korea ,grid.49100.3c0000 0001 0742 4007Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 37673 Korea
| | - Yoshimitsu Kohama
- grid.26999.3d0000 0001 2151 536XInstitute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581 Japan
| | - Koichi Kindo
- grid.26999.3d0000 0001 2151 536XInstitute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581 Japan
| | - Won Joon Cho
- grid.419666.a0000 0001 1945 5898Material Research Center, Samsung Advanced Institute of Technology (SAIT), Samsung Electronics Co., Ltd, Suwon-si, Gyeonggi-do 16678 Korea
| | - Eun Sang Choi
- grid.481548.40000 0001 2292 2549National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310 USA
| | - Youn Jung Jo
- grid.258803.40000 0001 0661 1556Department of Physics, Kyungpook National University, Daegu, Korea
| | - Woun Kang
- grid.255649.90000 0001 2171 7754Department of Physics, Ewha Womans University, Seoul, 03760 Republic of Korea
| | - Ji Hoon Shim
- grid.49100.3c0000 0001 0742 4007Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673 Korea
| | - Keun Su Kim
- grid.15444.300000 0004 0470 5454Department of Physics, Yonsei University, Seoul, 03722 Korea
| | - Jun Sung Kim
- grid.410720.00000 0004 1784 4496Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, 37673 Korea ,grid.49100.3c0000 0001 0742 4007Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 37673 Korea
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13
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Pathak R, Dutta P, Srivastava A, Rawat D, Gopal RK, Singh AK, Soni A, Biswas K. Strong Anharmonicity‐Induced Low Thermal Conductivity and High n‐type Mobility in the Topological Insulator Bi
1.1
Sb
0.9
Te
2
S. Angew Chem Int Ed Engl 2022; 61:e202210783. [DOI: 10.1002/anie.202210783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Indexed: 11/07/2022]
Affiliation(s)
- Riddhimoy Pathak
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) Jakkur P.O. Bangalore 560064 India
| | - Prabir Dutta
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) Jakkur P.O. Bangalore 560064 India
| | - Ashutosh Srivastava
- Materials Research Centre Indian Institute of Science Bangalore 560012 India
| | - Divya Rawat
- School of Basic Sciences Indian Institute of Technology Mandi Mandi, Himachal Pradesh 175005 India
| | - Radha Krishna Gopal
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) Jakkur P.O. Bangalore 560064 India
| | - Abhishek K. Singh
- Materials Research Centre Indian Institute of Science Bangalore 560012 India
| | - Ajay Soni
- School of Basic Sciences Indian Institute of Technology Mandi Mandi, Himachal Pradesh 175005 India
| | - Kanishka Biswas
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) Jakkur P.O. Bangalore 560064 India
- School of Advanced Materials and International Centre of Materials Science Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O. Bangalore 560064 India
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14
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Klein J, Pham T, Thomsen JD, Curtis JB, Denneulin T, Lorke M, Florian M, Steinhoff A, Wiscons RA, Luxa J, Sofer Z, Jahnke F, Narang P, Ross FM. Control of structure and spin texture in the van der Waals layered magnet CrSBr. Nat Commun 2022; 13:5420. [PMID: 36109520 PMCID: PMC9478124 DOI: 10.1038/s41467-022-32737-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 08/03/2022] [Indexed: 11/14/2022] Open
Abstract
Controlling magnetism at nanometer length scales is essential for realizing high-performance spintronic, magneto-electric and topological devices and creating on-demand spin Hamiltonians probing fundamental concepts in physics. Van der Waals (vdW)-bonded layered magnets offer exceptional opportunities for such spin texture engineering. Here, we demonstrate nanoscale structural control in the layered magnet CrSBr with the potential to create spin patterns without the environmental sensitivity that has hindered such manipulations in other vdW magnets. We drive a local phase transformation using an electron beam that moves atoms and exchanges bond directions, effectively creating regions that have vertical vdW layers embedded within the initial horizontally vdW bonded exfoliated flakes. We calculate that the newly formed two-dimensional structure is ferromagnetically ordered in-plane with an energy gap in the visible spectrum, and weak antiferromagnetism between the planes, suggesting possibilities for creating spin textures and quantum magnetic phases.
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Affiliation(s)
- J Klein
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
| | - T Pham
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - J D Thomsen
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - J B Curtis
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
- Department of Physics, Harvard University, Cambridge, MA, USA
| | - T Denneulin
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - M Lorke
- Institut für Theoretische Physik, Universität Bremen, P.O. Box 330 440, 28334, Bremen, Germany
| | - M Florian
- Institut für Theoretische Physik, Universität Bremen, P.O. Box 330 440, 28334, Bremen, Germany
- Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI, USA
| | - A Steinhoff
- Institut für Theoretische Physik, Universität Bremen, P.O. Box 330 440, 28334, Bremen, Germany
| | - R A Wiscons
- Department of Chemistry, Columbia University, New York, 10027, NY, USA
| | - J Luxa
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28, Prague 6, Czech Republic
| | - Z Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28, Prague 6, Czech Republic
| | - F Jahnke
- Institut für Theoretische Physik, Universität Bremen, P.O. Box 330 440, 28334, Bremen, Germany
| | - P Narang
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA.
| | - F M Ross
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
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15
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Cheng J, Miao BF, Liu Z, Yang M, He K, Zeng YL, Niu H, Yang X, Wang ZQ, Hong XH, Fu SJ, Sun L, Liu Y, Wu YZ, Yuan Z, Ding HF. Coherent Picture on the Pure Spin Transport between Ag/Bi and Ferromagnets. PHYSICAL REVIEW LETTERS 2022; 129:097203. [PMID: 36083669 DOI: 10.1103/physrevlett.129.097203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 07/26/2022] [Indexed: 06/15/2023]
Abstract
In a joint effort of both experiments and first-principles calculations, we resolve a hotly debated controversy and provide a coherent picture on the pure spin transport between Ag/Bi and ferromagnets. We demonstrate a strong inverse Rashba-Edelstein effect (IREE) at the interface in between Ag/Bi with a ferromagnetic metal (FM) but not with a ferromagnetic insulator. This is in sharp contrast to the previously claimed IREE at Ag/Bi interface or inverse spin Hall effect dominated spin transport. A more than one order of magnitude modulation of IREE signal is realized for different Ag/Bi-FM interfaces, casting strong tunability and a new direction for searching efficient spintronics materials.
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Affiliation(s)
- J Cheng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - B F Miao
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
| | - Z Liu
- Center for Advanced Quantum Studies and Department of Physics, Beijing Normal University, Beijing 100875, People's Republic of China
| | - M Yang
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - K He
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Y L Zeng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - H Niu
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - X Yang
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Z Q Wang
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - X H Hong
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - S J Fu
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - L Sun
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
| | - Y Liu
- Center for Advanced Quantum Studies and Department of Physics, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Y Z Wu
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
- Department of Physics, Fudan University, 220 Handan Road, Shanghai 200433, People's Republic of China
| | - Z Yuan
- Center for Advanced Quantum Studies and Department of Physics, Beijing Normal University, Beijing 100875, People's Republic of China
| | - H F Ding
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
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16
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Pathak R, Dutta P, Srivastava A, Rawat D, Gopal RK, Singh AK, Soni A, Biswas K. Strong Anharmonicity‐Induced Low Thermal conductivity and High n‐type Mobility in Topological Insulator Bi1.1Sb0.9Te2S. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Riddhimoy Pathak
- JNCASR: Jawaharlal Nehru Centre for Advanced Scientific Research NCU INDIA
| | - Prabir Dutta
- JNCASR: Jawaharlal Nehru Centre for Advanced Scientific Research NCU INDIA
| | | | - Divya Rawat
- IIT Mandi: Indian Institute of Technology Mandi Physics INDIA
| | | | | | - Ajay Soni
- IIT Mandi: Indian Institute of Technology Mandi Physics INDIA
| | - Kanishka Biswas
- JNCASR: Jawaharlal Nehru Centre for Advanced Scientific Research New Chemistry Unit Jakkur Bangalore INDIA
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17
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Ultrahigh transverse thermoelectric power factor in flexible Weyl semimetal WTe 2. Nat Commun 2022; 13:3909. [PMID: 35798731 PMCID: PMC9262886 DOI: 10.1038/s41467-022-31372-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 06/16/2022] [Indexed: 11/19/2022] Open
Abstract
Topological semimetals are well known for their interesting physical properties, while their mechanical properties have rarely received attention. With the increasing demand for flexible electronics, we explore the great potential of the van der Waals bonded Weyl semimetal WTe2 for flexible thermoelectric applications. We find that WTe2 single crystals have an ultrahigh Nernst power factor of ~3 Wm−1K−2, which outperforms the conventional Seebeck power factors of the state-of-the-art thermoelectric semiconductors by 2–3 orders of magnitude. A unique band structure that hosts compensated electrons and holes with extremely high mobilities is the primary mechanism for this huge Nernst power factor. Moreover, a large Ettingshausen signal of ~5 × 10−5 KA−1m is observed at 23.1 K and 9 T. In this work, the combination of the exceptional Nernst–Ettingshausen performance and excellent mechanical transformative ability of WTe2 would be instructive for flexible micro-/nano-thermoelectric devices. Flexible thermoelectrics are of great interest with increasing demand of flexible and wearable electronics. Here, the authors demonstrate that the Weyl semimetal, WTe2, has a high Nernst power factor and great mechanical flexibility.
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18
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Tamerius AD, Altman AB, Waters MJ, Riesel EA, Malliakas CD, Whitaker ML, Yu T, Fabbris G, Meng Y, Haskel D, Wang Y, Jacobsen SD, Rondinelli JM, Freedman DE. Synthesis of the Candidate Topological Compound Ni 3Pb 2. J Am Chem Soc 2022; 144:11943-11948. [PMID: 35767718 DOI: 10.1021/jacs.2c03485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Spin-orbit coupling enables the realization of topologically nontrivial ground states. As spin-orbit coupling increases with increasing atomic number, compounds featuring heavy elements, such as lead, offer a pathway toward creating new topologically nontrivial materials. By employing a high-pressure flux synthesis method, we synthesized single crystals of Ni3Pb2, the first structurally characterized bulk binary phase in the Ni-Pb system. Combining experimental and theoretical techniques, we examined structure and bonding in Ni3Pb2, revealing the impact of chemical substitutions on electronic structure features of importance for controlling topological behavior. From these results, we determined that Ni3Pb2 completes a series of structurally related transition-metal-heavy main group intermetallic materials that exhibit diverse electronic structures, opening a platform for synthetically tunable topologically nontrivial materials.
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Affiliation(s)
- Alexandra D Tamerius
- Department of Chemistry and Physical Sciences, Marian University, Indianapolis, Indiana 46222, United States.,Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Alison B Altman
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.,Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02142, United States
| | - Michael J Waters
- Department of Materials Science and EngineeringNorthwestern University, Evanston, Illinois 60208, United States
| | - Eric A Riesel
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02142, United States
| | - Christos D Malliakas
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Matthew L Whitaker
- Mineral Physics Institute, Department of Geosciences, Stony Brook University, Stony Brook, New York 11794, United States.,National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Tony Yu
- GeoSoilEnviroCARS, Center for Advanced Radiation Sources, The University of Chicago, Chicago, Illinois 60637, United States
| | - Gilberto Fabbris
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Yue Meng
- HPCAT, X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Daniel Haskel
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Yanbin Wang
- GeoSoilEnviroCARS, Center for Advanced Radiation Sources, The University of Chicago, Chicago, Illinois 60637, United States
| | - Steven D Jacobsen
- Department of Earth and Planetary Sciences, Northwestern University, Evanston, Illinois 60208, United States
| | - James M Rondinelli
- Department of Materials Science and EngineeringNorthwestern University, Evanston, Illinois 60208, United States
| | - Danna E Freedman
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02142, United States
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19
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Chen J, Qin Q, Peng C, Li ZY. Robust topological one-way edge states in radius-fluctuated photonic Chern topological insulators. OPTICS EXPRESS 2022; 30:21621-21633. [PMID: 36224877 DOI: 10.1364/oe.457593] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 05/19/2022] [Indexed: 06/16/2023]
Abstract
Recent developments in topological photonics have shown that the introduction of disorders can yield the innovative and striking transport phenomena. Here, we theoretically investigate topological one-way edge states in radius-fluctuated photonic Chern topological insulators (PCTIs), which are composed of two-dimensional gyromagnetic photonic crystals with cylinder site fixed but with cylinder radius fluctuated. We use a fluctuation index to characterize the degree of radius fluctuation, employ two empirical parameters to inspect the evolution of topological one-way edge states, and verify the stability of topological one-way edge states by calculating massive samples with various random numbers. We find that as the radius-fluctuation strength increases, there arises a competition between topological one-way edge state, Anderson localization state and trivial bulk state. We reveal that the Anderson localization state appears far more easily in the radius-fluctuation PCTI with even a weak strength compared with the position-perturbed PCTI with a strong randomness. We also demonstrate that the topological one-way edge states are protected against a strong fluctuation much larger than the fabrication errors in practical experiments. Our results show that the PCTIs consisting of gyromagnetic photonic crystals have a high-tolerance for the material and sample fabrication errors, and this would provide a deeper understanding of fundamental topology physics.
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20
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Ferroelectric Memory Based on Topological Domain Structures: A Phase Field Simulation. CRYSTALS 2022. [DOI: 10.3390/cryst12060786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The low storage density of ferroelectric thin film memory currently limits the further application of ferroelectric memory. Topologies based on controllable ferroelectric domain structures offer opportunities to develop microelectronic devices such as high-density memories. This study uses ferroelectric topology domains in a ferroelectric field-effect transistor (FeFET) structure for memory. The electrical behavior of FeFET and its flip properties under strain and electric fields are investigated using a phase-field model combined with the device equations of field-effect transistors. When the dimensionless electric field changes from −0.10 to 0.10, the memory window drops from 2.49 V to 0.6 V and the on-state current drops from 2.511 mA to 1.951 mA; the off-state current grows from 1.532 mA to 1.877 mA. External tensile stress increases the memory window and off-state current, while compressive stress decreases it. This study shows that a ferroelectric topology can be used as memory and could significantly increase the storage density of ferroelectric memory.
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21
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Aiello CD, Abendroth JM, Abbas M, Afanasev A, Agarwal S, Banerjee AS, Beratan DN, Belling JN, Berche B, Botana A, Caram JR, Celardo GL, Cuniberti G, Garcia-Etxarri A, Dianat A, Diez-Perez I, Guo Y, Gutierrez R, Herrmann C, Hihath J, Kale S, Kurian P, Lai YC, Liu T, Lopez A, Medina E, Mujica V, Naaman R, Noormandipour M, Palma JL, Paltiel Y, Petuskey W, Ribeiro-Silva JC, Saenz JJ, Santos EJG, Solyanik-Gorgone M, Sorger VJ, Stemer DM, Ugalde JM, Valdes-Curiel A, Varela S, Waldeck DH, Wasielewski MR, Weiss PS, Zacharias H, Wang QH. A Chirality-Based Quantum Leap. ACS NANO 2022; 16:4989-5035. [PMID: 35318848 PMCID: PMC9278663 DOI: 10.1021/acsnano.1c01347] [Citation(s) in RCA: 55] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
There is increasing interest in the study of chiral degrees of freedom occurring in matter and in electromagnetic fields. Opportunities in quantum sciences will likely exploit two main areas that are the focus of this Review: (1) recent observations of the chiral-induced spin selectivity (CISS) effect in chiral molecules and engineered nanomaterials and (2) rapidly evolving nanophotonic strategies designed to amplify chiral light-matter interactions. On the one hand, the CISS effect underpins the observation that charge transport through nanoscopic chiral structures favors a particular electronic spin orientation, resulting in large room-temperature spin polarizations. Observations of the CISS effect suggest opportunities for spin control and for the design and fabrication of room-temperature quantum devices from the bottom up, with atomic-scale precision and molecular modularity. On the other hand, chiral-optical effects that depend on both spin- and orbital-angular momentum of photons could offer key advantages in all-optical and quantum information technologies. In particular, amplification of these chiral light-matter interactions using rationally designed plasmonic and dielectric nanomaterials provide approaches to manipulate light intensity, polarization, and phase in confined nanoscale geometries. Any technology that relies on optimal charge transport, or optical control and readout, including quantum devices for logic, sensing, and storage, may benefit from chiral quantum properties. These properties can be theoretically and experimentally investigated from a quantum information perspective, which has not yet been fully developed. There are uncharted implications for the quantum sciences once chiral couplings can be engineered to control the storage, transduction, and manipulation of quantum information. This forward-looking Review provides a survey of the experimental and theoretical fundamentals of chiral-influenced quantum effects and presents a vision for their possible future roles in enabling room-temperature quantum technologies.
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Affiliation(s)
- Clarice D. Aiello
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - John M. Abendroth
- Laboratory
for Solid State Physics, ETH Zürich, Zürich 8093, Switzerland
| | - Muneer Abbas
- Department
of Microbiology, Howard University, Washington, D.C. 20059, United States
| | - Andrei Afanasev
- Department
of Physics, George Washington University, Washington, D.C. 20052, United States
| | - Shivang Agarwal
- Department
of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Amartya S. Banerjee
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Materials Science and Engineering, University
of California, Los Angeles, Los Angeles, California 90095, United States
| | - David N. Beratan
- Departments
of Chemistry, Biochemistry, and Physics, Duke University, Durham, North Carolina 27708, United States
| | - Jason N. Belling
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, Los Angeles, California 90095, United States
| | - Bertrand Berche
- Laboratoire
de Physique et Chimie Théoriques, UMR Université de Lorraine-CNRS, 7019 54506 Vandœuvre les
Nancy, France
| | - Antia Botana
- Department
of Physics, Arizona State University, Tempe, Arizona 85287, United States
| | - Justin R. Caram
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, Los Angeles, California 90095, United States
| | - Giuseppe Luca Celardo
- Institute
of Physics, Benemerita Universidad Autonoma
de Puebla, Apartado Postal J-48, 72570, Mexico
- Department
of Physics and Astronomy, University of
Florence, 50019 Sesto Fiorentino, Italy
| | - Gianaurelio Cuniberti
- Institute
for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany
| | - Aitzol Garcia-Etxarri
- Donostia
International Physics Center, Paseo Manuel de Lardizabal 4, 20018 Donostia, San Sebastian, Spain
- IKERBASQUE,
Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain
| | - Arezoo Dianat
- Institute
for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany
| | - Ismael Diez-Perez
- Department
of Chemistry, Faculty of Natural and Mathematical Sciences, King’s College London, 7 Trinity Street, London SE1 1DB, United Kingdom
| | - Yuqi Guo
- School
for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, United States
| | - Rafael Gutierrez
- Institute
for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany
| | - Carmen Herrmann
- Department
of Chemistry, University of Hamburg, 20146 Hamburg, Germany
| | - Joshua Hihath
- Department
of Electrical and Computer Engineering, University of California, Davis, Davis, California 95616, United States
| | - Suneet Kale
- School
of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Philip Kurian
- Quantum
Biology Laboratory, Graduate School, Howard
University, Washington, D.C. 20059, United States
| | - Ying-Cheng Lai
- School
of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, United States
| | - Tianhan Liu
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, Los Angeles, California 90095, United States
| | - Alexander Lopez
- Escuela
Superior Politécnica del Litoral, ESPOL, Campus Gustavo Galindo Km. 30.5 Vía Perimetral, PO Box 09-01-5863, Guayaquil 090902, Ecuador
| | - Ernesto Medina
- Departamento
de Física, Colegio de Ciencias e Ingeniería, Universidad San Francisco de Quito, Av. Diego de Robles
y Vía Interoceánica, Quito 170901, Ecuador
| | - Vladimiro Mujica
- School
of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
- Kimika
Fakultatea, Euskal Herriko Unibertsitatea, 20080 Donostia, Euskadi, Spain
| | - Ron Naaman
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, Rehovot 76100, Israel
| | - Mohammadreza Noormandipour
- Department
of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- TCM Group,
Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - Julio L. Palma
- Department
of Chemistry, Pennsylvania State University, Lemont Furnace, Pennsylvania 15456, United States
| | - Yossi Paltiel
- Applied
Physics Department and the Center for Nano-Science and Nano-Technology, Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - William Petuskey
- School
of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - João Carlos Ribeiro-Silva
- Laboratory
of Genetics and Molecular Cardiology, Heart Institute, University of São Paulo Medical School, 05508-900 São
Paulo, Brazil
| | - Juan José Saenz
- Donostia
International Physics Center, Paseo Manuel de Lardizabal 4, 20018 Donostia, San Sebastian, Spain
- IKERBASQUE,
Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain
| | - Elton J. G. Santos
- Institute
for Condensed Matter Physics and Complex Systems, School of Physics
and Astronomy, The University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
- Higgs Centre
for Theoretical Physics, The University
of Edinburgh, Edinburgh, EH9 3FD, United Kingdom
| | - Maria Solyanik-Gorgone
- Department
of Electrical and Computer Engineering, George Washington University, Washington, D.C. 20052, United States
| | - Volker J. Sorger
- Department
of Electrical and Computer Engineering, George Washington University, Washington, D.C. 20052, United States
| | - Dominik M. Stemer
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Materials Science and Engineering, University
of California, Los Angeles, Los Angeles, California 90095, United States
| | - Jesus M. Ugalde
- Kimika
Fakultatea, Euskal Herriko Unibertsitatea, 20080 Donostia, Euskadi, Spain
| | - Ana Valdes-Curiel
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Solmar Varela
- School
of Chemical Sciences and Engineering, Yachay
Tech University, 100119 Urcuquí, Ecuador
| | - David H. Waldeck
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Michael R. Wasielewski
- Department
of Chemistry, Center for Molecular Quantum Transduction, and Institute
for Sustainability and Energy at Northwestern, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Paul S. Weiss
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Materials Science and Engineering, University
of California, Los Angeles, Los Angeles, California 90095, United States
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, Los Angeles, California 90095, United States
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California, 90095, United States
| | - Helmut Zacharias
- Center
for Soft Nanoscience, University of Münster, 48149 Münster, Germany
| | - Qing Hua Wang
- School
for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, United States
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22
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Scheie A, Laurell P, McClarty PA, Granroth GE, Stone MB, Moessner R, Nagler SE. Dirac Magnons, Nodal Lines, and Nodal Plane in Elemental Gadolinium. PHYSICAL REVIEW LETTERS 2022; 128:097201. [PMID: 35302826 DOI: 10.1103/physrevlett.128.097201] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 01/12/2022] [Indexed: 06/14/2023]
Abstract
We investigate the magnetic excitations of elemental gadolinium (Gd) using inelastic neutron scattering, showing that Gd is a Dirac magnon material with nodal lines at K and nodal planes at half integer ℓ. We find an anisotropic intensity winding around the K-point Dirac magnon cone, which is interpreted to indicate Berry phase physics. Using linear spin wave theory calculations, we show the nodal lines have nontrivial Berry phases, and topological surface modes. We also discuss the origin of the nodal plane in terms of a screw-axis symmetry, and introduce a topological invariant characterizing its presence and effect on the scattering intensity. Together, these results indicate a highly nontrivial topology, which is generic to hexagonal close packed ferromagnets. We discuss potential implications for other such systems.
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Affiliation(s)
- A Scheie
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Pontus Laurell
- Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - P A McClarty
- Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Str. 38, 01187 Dresden, Germany
| | - G E Granroth
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - M B Stone
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - R Moessner
- Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Str. 38, 01187 Dresden, Germany
| | - S E Nagler
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Quantum Science Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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23
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Wang J, Yuan H, Liu Y, Zhou F, Wang X, Zhang G. Hourglass Weyl and Dirac nodal line phonons, and drumhead-like and torus phonon surface states in orthorhombic-type KCuS. Phys Chem Chem Phys 2022; 24:2752-2757. [PMID: 35044396 DOI: 10.1039/d1cp05217a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In parallel to electronic systems, the concept of topology has been extended to phonons, which has led to the birth of topological phonons. In this Communication, based on symmetry analysis and first-principles calculations, we propose that hourglass Weyl nodal line (HWNL) phonons and Dirac nodal line (DNL) phonons coexist in the phonon dispersion of a single material, KCuS, with a Pnma-type structure. The HWNLs and DNLs are relatively flat in frequency and well separated from other phonon bands. The drumhead-like phonon surface state and the torus phonon surface state appear at the [001] and [100] surfaces, respectively. The reason for this phenomenon is explained based on the Zak phase calculations. The DNL and HWNL phonons are symmetry-related and these phonons can also be observed in other realistic materials, such as BaSi2, TiB and ZrSi, with a Pnma-type structure. Our Communication, for the first time, proves that phononic nodal lines with different types of degeneracies and different types of phonon surface states can be achieved in one single material. Thus, KCuS with a Pnma-type structure can be viewed as a good platform to investigate the entanglement between HWNL phonons and DNL phonons and to realize the drumhead-like and torus phonon surface states.
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Affiliation(s)
- Jianhua Wang
- School of Physical Science and Technology, Southwest University, Chongqing 400715, China.
| | - Hongkuan Yuan
- School of Physical Science and Technology, Southwest University, Chongqing 400715, China.
| | - Ying Liu
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
| | - Feng Zhou
- School of Physical Science and Technology, Southwest University, Chongqing 400715, China.
| | - Xiaotian Wang
- School of Physical Science and Technology, Southwest University, Chongqing 400715, China.
| | - Gang Zhang
- Institute of High Performance Computing, Agency for Science, Technology and Research (A*STAR), 138632, Singapore.
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24
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Pan Y, Le C, He B, Watzman SJ, Yao M, Gooth J, Heremans JP, Sun Y, Felser C. Giant anomalous Nernst signal in the antiferromagnet YbMnBi 2. NATURE MATERIALS 2022; 21:203-209. [PMID: 34811495 PMCID: PMC8810386 DOI: 10.1038/s41563-021-01149-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 10/04/2021] [Indexed: 05/22/2023]
Abstract
A large anomalous Nernst effect (ANE) is crucial for thermoelectric energy conversion applications because the associated unique transverse geometry facilitates module fabrication. Topological ferromagnets with large Berry curvatures show large ANEs; however, they face drawbacks such as strong magnetic disturbances and low mobility due to high magnetization. Herein, we demonstrate that YbMnBi2, a canted antiferromagnet, has a large ANE conductivity of ~10 A m-1 K-1 that surpasses large values observed in other ferromagnets (3-5 A m-1 K-1). The canted spin structure of Mn guarantees a non-zero Berry curvature, but generates only a weak magnetization three orders of magnitude lower than that of general ferromagnets. The heavy Bi with a large spin-orbit coupling enables a large ANE and low thermal conductivity, whereas its highly dispersive px/y orbitals ensure low resistivity. The high anomalous transverse thermoelectric performance and extremely small magnetization make YbMnBi2 an excellent candidate for transverse thermoelectrics.
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Affiliation(s)
- Yu Pan
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany.
| | - Congcong Le
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
| | - Bin He
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
| | - Sarah J Watzman
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, USA
- Department of Mechanical and Materials Engineering, University of Cincinnati, Cincinnati, OH, USA
| | - Mengyu Yao
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
| | - Johannes Gooth
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
| | - Joseph P Heremans
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, USA
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, USA
- Department of Physics, The Ohio State University, Columbus, OH, USA
| | - Yan Sun
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
| | - Claudia Felser
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany.
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25
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Nguyen TH, Son J, Kim S, Cho H, Kim CH, Wang YP, Burch KS, Yang IS, Jeong J, Park JG, Moon SJ, Noh TW. Topological Magnon Band Crossing in Y_{2}Ir_{2}O_{7}. PHYSICAL REVIEW LETTERS 2021; 127:267203. [PMID: 35029465 DOI: 10.1103/physrevlett.127.267203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 11/22/2021] [Indexed: 06/14/2023]
Abstract
Topological magnonic materials have attracted much interest because of the potential for dissipationless spintronic applications. Pyrochlore iridates are theoretically regarded as good candidates for designing topological magnon bands. However, experimental identification of topological magnon bands in pyrochlore iridates remains elusive. We explored this possibility in Y_{2}Ir_{2}O_{7} using Raman spectroscopy to measure both the single-magnon excitations and anomalous phonon shifts. From the single-magnon energies and tight-binding model calculations concerning the phonons, we determined the key parameters in the spin Hamiltonian. These confirm that Y_{2}Ir_{2}O_{7} hosts a nontrivial magnon band topology distinct from other pyrochlore iridate compounds. Our work demonstrates that pyrochlore iridates constitute a system in which the magnon band topology can be tailored and that Raman spectroscopy is a powerful technique to explore magnon band topology.
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Affiliation(s)
- Thi Huyen Nguyen
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Jaeseok Son
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Soyeun Kim
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Hwanbeom Cho
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Choong H Kim
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Y P Wang
- Physics Department, Boston College, Boston, Massachusetts 02467, USA
| | - Kenneth S Burch
- Physics Department, Boston College, Boston, Massachusetts 02467, USA
| | - In-Sang Yang
- Department of Physics, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Jaehong Jeong
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Je-Geun Park
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
- Center for Quantum Materials, Seoul National University, Seoul 08826, Republic of Korea
| | - S J Moon
- Department of Physics, Hanyang University, Seoul 04763, Republic of Korea
| | - T W Noh
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
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26
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Lee S, Viswanathan G, Carnahan S, Harmer C, Akopov G, Rossini A, Miller G, Kovnir K. Add a Pinch of Tetrel: The Transformation of a Centrosymmetric Metal into a Nonsymmorphic and Chiral Semiconductor. Chemistry 2021; 28:e202104319. [PMID: 34882857 PMCID: PMC9302624 DOI: 10.1002/chem.202104319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Indexed: 11/21/2022]
Abstract
Centrosymmetric skutterudite RhP3 was converted to a nonsymmorphic and chiral compound RhSi0.3P2.7 (space group P212121) by means of partial replacement of Si for P. The structure, determined by a combination of X‐ray crystallography and solid state 31P NMR, exhibits branched polyanionic P/Si chains that are unique among metal phosphides. A driving force to stabilize the locally noncentrosymmetric cis‐RhSi2P4 and fac‐RhSi3P3 fragments is π‐electron back‐donation between the Rh t2g‐type orbitals and the unoccupied antibonding Si/P orbitals, which is more effective for Si than for P. In situ studies and total energy calculations revealed the metastable nature of RhSi0.3P2.7. Electronic structure calculations predicted centrosymmetric cubic RhP3 to be metallic which was confirmed by transport properties measurements. In contrast, the electronic structure for chiral orthorhombic RhSi0.3P2.7 contained a bandgap, and this compound was shown to be a narrow gap semiconductor.
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Affiliation(s)
- Shannon Lee
- Iowa State University of Science and Technology: Iowa State University, Chemistry, UNITED STATES
| | - Gayatri Viswanathan
- Iowa State University of Science and Technology: Iowa State University, Chemistry, UNITED STATES
| | - Scott Carnahan
- Iowa State University of Science and Technology: Iowa State University, Chemistry, UNITED STATES
| | - Colin Harmer
- Iowa State University of Science and Technology: Iowa State University, Chemistry, UNITED STATES
| | | | - Aaron Rossini
- Iowa State University of Science and Technology: Iowa State University, Chemistry, UNITED STATES
| | - Gordon Miller
- Iowa State University of Science and Technology: Iowa State University, Chemistry, UNITED STATES
| | - Kirill Kovnir
- Iowa State University, Department of Chemistry, 2415 Osborn Drive, 50011, Ames, UNITED STATES
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27
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Seo J, De C, Ha H, Lee JE, Park S, Park J, Skourski Y, Choi ES, Kim B, Cho GY, Yeom HW, Cheong SW, Kim JH, Yang BJ, Kim K, Kim JS. Colossal angular magnetoresistance in ferrimagnetic nodal-line semiconductors. Nature 2021; 599:576-581. [PMID: 34819684 DOI: 10.1038/s41586-021-04028-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 09/15/2021] [Indexed: 11/09/2022]
Abstract
Efficient magnetic control of electronic conduction is at the heart of spintronic functionality for memory and logic applications1,2. Magnets with topological band crossings serve as a good material platform for such control, because their topological band degeneracy can be readily tuned by spin configurations, dramatically modulating electronic conduction3-10. Here we propose that the topological nodal-line degeneracy of spin-polarized bands in magnetic semiconductors induces an extremely large angular response of magnetotransport. Taking a layered ferrimagnet, Mn3Si2Te6, and its derived compounds as a model system, we show that the topological band degeneracy, driven by chiral molecular orbital states, is lifted depending on spin orientation, which leads to a metal-insulator transition in the same ferrimagnetic phase. The resulting variation of angular magnetoresistance with rotating magnetization exceeds a trillion per cent per radian, which we call colossal angular magnetoresistance. Our findings demonstrate that magnetic nodal-line semiconductors are a promising platform for realizing extremely sensitive spin- and orbital-dependent functionalities.
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Affiliation(s)
- Junho Seo
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, Korea.,Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Chandan De
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, Korea.,Laboratory of Pohang Emergent Materials, Pohang Accelerator Laboratory, Pohang, Korea
| | - Hyunsoo Ha
- Department of Physics and Astronomy, Seoul National University, Seoul, Korea
| | - Ji Eun Lee
- Department of Physics, Yonsei University, Seoul, Korea
| | - Sungyu Park
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, Korea
| | - Joonbum Park
- Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
| | - Yurii Skourski
- Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
| | - Eun Sang Choi
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA
| | - Bongjae Kim
- Department of Physics, Kunsan National University, Gunsan, Korea
| | - Gil Young Cho
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, Korea.,Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, Korea.,Asia Pacific Center for Theoretical Physics, Pohang, Korea
| | - Han Woong Yeom
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, Korea.,Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Sang-Wook Cheong
- Laboratory of Pohang Emergent Materials, Pohang Accelerator Laboratory, Pohang, Korea.,Rutgers Center for Emergent Materials and Department of Physics & Astronomy, Rutgers University, Piscataway, NJ, USA
| | - Jae Hoon Kim
- Department of Physics, Yonsei University, Seoul, Korea.
| | - Bohm-Jung Yang
- Department of Physics and Astronomy, Seoul National University, Seoul, Korea. .,Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul, Korea. .,Center for Theoretical Physics (CTP), Seoul National University, Seoul, Korea.
| | - Kyoo Kim
- Korea Atomic Energy Research Institute (KAERI), Daejeon, Korea.
| | - Jun Sung Kim
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, Korea. .,Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, Korea.
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28
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Yan M, Jin Y, Hou X, Guo Y, Tsaturyan A, Makarova A, Smirnov D, Dedkov Y, Voloshina E. Topological Quasi-2D Semimetal Co 3Sn 2S 2: Insights into Electronic Structure from NEXAFS and Resonant Photoelectron Spectroscopy. J Phys Chem Lett 2021; 12:9807-9811. [PMID: 34597509 DOI: 10.1021/acs.jpclett.1c02790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The electronic structure of the natural topological semimetal Co3Sn2S2 crystals was studied by using near-edge X-ray absorption spectroscopy (NEXAFS) and resonant photoelectron spectroscopy (ResPES). Although, the significant increase of the Co 3d valence band emission is observed at the Co 2p absorption edge in the ResPES experiments, the spectral weight at these photon energies is dominated by the normal Auger contribution. This observation indicates the delocalized character of photoexcited Co 3d electrons and is supported by the first-principle calculations. Our results on the investigations of the element- and orbital-specific electronic states near the Fermi level of Co3Sn2S2 are of importance for the comprehensive description of the electronic structure of this material, which is significant for its future applications in different areas of science and technology, including catalysis and water splitting.
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Affiliation(s)
- Mouhui Yan
- Department of Physics, Shanghai University, 200444 Shanghai, China
| | - Yichen Jin
- Department of Physics, Shanghai University, 200444 Shanghai, China
| | - Xiaofei Hou
- School of Physical Science and Technology, ShanghaiTech University, 201210 Shanghai, China
| | - Yanfeng Guo
- School of Physical Science and Technology, ShanghaiTech University, 201210 Shanghai, China
| | - Arshak Tsaturyan
- Institute of Physical and Organic Chemistry, Southern Federal University, 344090 Rostov on Don, Russia
| | - Anna Makarova
- Institut für Chemie und Biochemie, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Dmitry Smirnov
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01069 Dresden, Germany
| | - Yuriy Dedkov
- Department of Physics, Shanghai University, 200444 Shanghai, China
- Centre of Excellence ENSEMBLE3 Sp. z o. o., ul. Wolczynska 133, 01-919 Warsaw, Poland
| | - Elena Voloshina
- Department of Physics, Shanghai University, 200444 Shanghai, China
- Institut für Chemie und Biochemie, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
- Centre of Excellence ENSEMBLE3 Sp. z o. o., ul. Wolczynska 133, 01-919 Warsaw, Poland
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29
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van Delft MR, Wang Y, Putzke C, Oswald J, Varnavides G, Garcia CAC, Guo C, Schmid H, Süss V, Borrmann H, Diaz J, Sun Y, Felser C, Gotsmann B, Narang P, Moll PJW. Sondheimer oscillations as a probe of non-ohmic flow in WP 2 crystals. Nat Commun 2021; 12:4799. [PMID: 34376659 PMCID: PMC8355329 DOI: 10.1038/s41467-021-25037-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 07/21/2021] [Indexed: 11/08/2022] Open
Abstract
As conductors in electronic applications shrink, microscopic conduction processes lead to strong deviations from Ohm's law. Depending on the length scales of momentum conserving (lMC) and relaxing (lMR) electron scattering, and the device size (d), current flows may shift from ohmic to ballistic to hydrodynamic regimes. So far, an in situ methodology to obtain these parameters within a micro/nanodevice is critically lacking. In this context, we exploit Sondheimer oscillations, semi-classical magnetoresistance oscillations due to helical electronic motion, as a method to obtain lMR even when lMR ≫ d. We extract lMR from the Sondheimer amplitude in WP2, at temperatures up to T ~ 40 K, a range most relevant for hydrodynamic transport phenomena. Our data on μm-sized devices are in excellent agreement with experimental reports of the bulk lMR and confirm that WP2 can be microfabricated without degradation. These results conclusively establish Sondheimer oscillations as a quantitative probe of lMR in micro-devices.
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Affiliation(s)
- Maarten R van Delft
- Laboratory of Quantum Materials (QMAT), Institute of Materials (IMX), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
| | - Yaxian Wang
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - Carsten Putzke
- Laboratory of Quantum Materials (QMAT), Institute of Materials (IMX), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Jacopo Oswald
- IBM Research Europe - Zurich, Rüschlikon, Switzerland
| | - Georgios Varnavides
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - Christina A C Garcia
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - Chunyu Guo
- Laboratory of Quantum Materials (QMAT), Institute of Materials (IMX), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Heinz Schmid
- IBM Research Europe - Zurich, Rüschlikon, Switzerland
| | - Vicky Süss
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
| | - Horst Borrmann
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
| | - Jonas Diaz
- Laboratory of Quantum Materials (QMAT), Institute of Materials (IMX), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Yan Sun
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
| | - Claudia Felser
- Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
| | | | - Prineha Narang
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA.
| | - Philip J W Moll
- Laboratory of Quantum Materials (QMAT), Institute of Materials (IMX), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
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30
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Lee SJ, Won J, Wang LL, Jing D, Harmer CP, Mark J, Akopov G, Kovnir K. New Noncentrosymmetric Tetrel Pnictides Composed of Square-Planar Gold(I) with Peculiar Bonding. Chemistry 2021; 27:7383-7390. [PMID: 33523500 PMCID: PMC8251799 DOI: 10.1002/chem.202005312] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Indexed: 11/18/2022]
Abstract
Three novel isostructural equiatomic gold tetrel pnictides, AuSiAs, AuGeP, and AuGeAs, were synthesized and characterized. These phases crystallize in the noncentrosymmetric (NCS) monoclinic space group Cc (no. 9), featuring square‐planar Au within cis‐[AuTt2Pn2] units (Tt=tetrel, Si, Ge; Pn=pnictogen, P, As). This is in drastic contrast to the structure of previously reported AuSiP, which exhibits typical linear coordination of Au with Si and P. Chemical bonding analysis through the electron localization function suggests covalent two‐center two‐electron Tt−Pn bonds, and three‐center Au−Tt−Au and Au−Pn−Au bonds with 1.6 e− per bond. X‐ray photoelectron spectroscopy studies support the covalent and nonionic nature of Au−Pn and Au−Tt bonds. The title materials were found to be n‐type narrow‐gap semiconductors or semimetals, with nearly temperature‐independent electrical resistivities and low thermal conductivities. A combination of the semimetallic properties with tunable NCS structure provides opportunities for the development of materials based on gold tetrel pnictides.
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Affiliation(s)
- Shannon J Lee
- Department of Chemistry, Iowa State University, Ames, IA, 50011, USA.,U.S. Department of Energy, Ames Laboratory, Ames, IA, 50011, USA
| | - Juyeon Won
- Department of Chemistry, Iowa State University, Ames, IA, 50011, USA.,U.S. Department of Energy, Ames Laboratory, Ames, IA, 50011, USA
| | - Lin-Lin Wang
- U.S. Department of Energy, Ames Laboratory, Ames, IA, 50011, USA
| | - Dapeng Jing
- U.S. Department of Energy, Ames Laboratory, Ames, IA, 50011, USA.,Materials Analysis and Research Laboratory, Iowa State University, Ames, IA, 50011, USA
| | - Colin P Harmer
- Department of Chemistry, Iowa State University, Ames, IA, 50011, USA.,U.S. Department of Energy, Ames Laboratory, Ames, IA, 50011, USA
| | - Justin Mark
- Department of Chemistry, Iowa State University, Ames, IA, 50011, USA.,U.S. Department of Energy, Ames Laboratory, Ames, IA, 50011, USA
| | - Georgiy Akopov
- Department of Chemistry, Iowa State University, Ames, IA, 50011, USA.,U.S. Department of Energy, Ames Laboratory, Ames, IA, 50011, USA
| | - Kirill Kovnir
- Department of Chemistry, Iowa State University, Ames, IA, 50011, USA.,U.S. Department of Energy, Ames Laboratory, Ames, IA, 50011, USA
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