Magnetoresistance hysteresis in the superconducting state of kagome CsV3Sb5

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外文摘要：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.

外文关键词：

hysteresismagnetoresistancekagome superconductorchiral superconductor

作者：

乐天、刘锦锦、王秩伟、林效

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作者单位：

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

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

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基金：

the"Pioneer"and"Leading Goose"R&D Program of ZhejiangNational Natural Science Foundation of ChinaChina Postdoctoral Science FoundationChina Postdoctoral Science FoundationZhejiang Provincial Natural Science Foundation of China for Distinguished Young ScholarsResearch Center for Industries of the Future(RCIF)at Westlake UniversityNational Key R&D Program of ChinaNational Key R&D Program of ChinaBeijing Natural Science Foundation

项目编号：

2024SDXHDX0007124741312022M7228452023T160586LR23A040001WU2023C0092020YFA03088002022YFA1403400Z210006

出版年：

2024

DOI：

10.1088/1674-1056/ad6423

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

年,卷(期)：2024.33(10)