Magnetoresistance hysteresis in the superconducting state of kagome CsV3Sb5

乐天 ¹刘锦锦 ²王秩伟 ³林效¹

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作者信息

1. Institute of Natural Sciences,Westlake Institute for Advanced Study,Hangzhou 310024,China;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 310030,China
2. Centre for Quantum Physics,Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE),School of Physics,Beijing Institute of Technology,Beijing 100081,China;Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems,Beijing Institute of Technology,Beijing 100081,China
3. Centre for Quantum Physics,Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE),School of Physics,Beijing Institute of Technology,Beijing 100081,China;Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems,Beijing Institute of Technology,Beijing 100081,China;Material Science Center,Yangtze Delta Region Academy of Beijing Institute of Technology,Jiaxing 314011,China
折叠

Abstract

The hysteresis of magnetoresistance observed in superconductors is of great interest due to its potential connection with unconventional superconductivity.In this study,we perform electrical transport measurements on kagome supercon-ductor CsV3Sb5 nanoflakes and uncover unusual hysteretic behavior of magnetoresistance in the superconducting state.This hysteresis can be induced by applying either a large DC or AC current at temperatures(T)well below the super-conducting transition temperature(Tc).As T approaches Tc,similar weak hysteresis is also detected by applying a small current.Various scenarios are discussed,with particular focus on the effects of vortex pinning and the presence of time-reversal-symmtery-breaking superconducting domains.Our findings support the latter,hinting at chiral superconductivity in kagome superconductors.

Key words

hysteresis/magnetoresistance/kagome superconductor/chiral superconductor

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基金项目

the"Pioneer"and"Leading Goose"R&D Program of Zhejiang(2024SDXHDX0007)

National Natural Science Foundation of China(12474131)

China Postdoctoral Science Foundation(2022M722845)

China Postdoctoral Science Foundation(2023T160586)

Zhejiang Provincial Natural Science Foundation of China for Distinguished Young Scholars(LR23A040001)

Research Center for Industries of the Future(RCIF)at Westlake University(WU2023C009)

National Key R&D Program of China(2020YFA0308800)

National Key R&D Program of China(2022YFA1403400)

Beijing Natural Science Foundation(Z210006)

出版年

2024

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

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