Superconducting diode effect and interference patterns in kagome CsV 3 Sb 5 .

Autor: Le T; Key Laboratory for Quantum Materials of Zhejiang Province, Department of Physics, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, People's Republic of China.; Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, People's Republic of China., Pan Z; Key Laboratory for Quantum Materials of Zhejiang Province, Department of Physics, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, People's Republic of China.; Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, People's Republic of China.; Institute for Theoretical Sciences, Westlake University, Hangzhou, China., Xu Z; Key Laboratory for Quantum Materials of Zhejiang Province, Department of Physics, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, People's Republic of China.; Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, People's Republic of China., Liu J; Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology, Beijing, China.; Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systems, Beijing Institute of Technology, Beijing, China., Wang J; Key Laboratory for Quantum Materials of Zhejiang Province, Department of Physics, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, People's Republic of China.; Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, People's Republic of China., Lou Z; Key Laboratory for Quantum Materials of Zhejiang Province, Department of Physics, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, People's Republic of China.; Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, People's Republic of China., Yang X; Key Laboratory for Quantum Materials of Zhejiang Province, Department of Physics, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, People's Republic of China.; Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, People's Republic of China.; Department of Physics, China Jiliang University, Hangzhou, People's Republic of China., Wang Z; Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology, Beijing, China. zhiweiwang@bit.edu.cn.; Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systems, Beijing Institute of Technology, Beijing, China. zhiweiwang@bit.edu.cn.; Material Science Center, Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing, China. zhiweiwang@bit.edu.cn., Yao Y; Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology, Beijing, China.; Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systems, Beijing Institute of Technology, Beijing, China.; Material Science Center, Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing, China., Wu C; Key Laboratory for Quantum Materials of Zhejiang Province, Department of Physics, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, People's Republic of China. wucongjun@westlake.edu.cn.; Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, People's Republic of China. wucongjun@westlake.edu.cn.; Institute for Theoretical Sciences, Westlake University, Hangzhou, China. wucongjun@westlake.edu.cn.; New Cornerstone Science Laboratory, Department of Physics, School of Science, Westlake University, Hangzhou, China. wucongjun@westlake.edu.cn., Lin X; Key Laboratory for Quantum Materials of Zhejiang Province, Department of Physics, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, People's Republic of China. linxiao@westlake.edu.cn.; Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, People's Republic of China. linxiao@westlake.edu.cn.
Jazyk: angličtina
Zdroj: Nature [Nature] 2024 Jun; Vol. 630 (8015), pp. 64-69. Date of Electronic Publication: 2024 May 15.
DOI: 10.1038/s41586-024-07431-y
Abstrakt: The interplay among frustrated lattice geometry, non-trivial band topology and correlation yields rich quantum states of matter in kagome systems 1,2 . A series of recent members in this family, AV 3 Sb 5 (A = K, Rb or Cs), exhibit a cascade of symmetry-breaking transitions 3 , involving the 3Q chiral charge ordering 4-8 , electronic nematicity 9,10 , roton pair density wave 11 and superconductivity 12 . The nature of the superconducting order is yet to be resolved. Here we report an indication of dynamic superconducting domains with boundary supercurrents in intrinsic CsV 3 Sb 5 flakes. The magnetic field-free superconducting diode effect is observed with polarity modulated by thermal histories, suggesting that there are dynamic superconducting order domains in a spontaneous time-reversal symmetry-breaking background. Strikingly, the critical current exhibits double-slit superconductivity interference patterns when subjected to an external magnetic field. The characteristics of the patterns are modulated by thermal cycling. These phenomena are proposed as a consequence of periodically modulated supercurrents flowing along certain domain boundaries constrained by fluxoid quantization. Our results imply a time-reversal symmetry-breaking superconducting order, opening a potential for exploring exotic physics, for example, Majorana zero modes, in this intriguing topological kagome system.
(© 2024. The Author(s), under exclusive licence to Springer Nature Limited.)
Databáze: MEDLINE
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