Magnetoresistance hysteresis in the superconducting state of kagome CsV_(3)Sb_(5)  

作　　者：Tian Le Jinjin Liu Zhiwei Wang Xiao Lin 乐天;刘锦锦;王秩伟;林效(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)

机构地区：[1]Institute of Natural Sciences,Westlake Institute for Advanced Study,Hangzhou 310024,China [2]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 [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 [4]Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems,Beijing Institute of Technology,Beijing 100081,China [5]Material Science Center,Yangtze Delta Region Academy of Beijing Institute of Technology,Jiaxing 314011,China

出　　处：《Chinese Physics B》2024年第10期30-34,共5页中国物理B（英文版）

基　　金：supported by the“Pioneer”and“Leading Goose”R&D Program of Zhejiang(Grant No.2024SDXHDX0007);the National Natural Science Foundation of China(Grant No.12474131);the China Postdoctoral Science Foundation(Grant Nos.2022M722845 and 2023T160586);the Zhejiang Provincial Natural Science Foundation of China for Distinguished Young Scholars(Grant No.LR23A040001);the Research Center for Industries of the Future(RCIF)at Westlake University(Grant No.WU2023C009);the National Key R&D Program of China(Grant Nos.2020YFA0308800 and 2022YFA1403400);the Beijing Natural Science Foundation(Grant No.Z210006).The authors thank the support provided by Dr.Chao Zhang from Instrumentation and Service Center for Physical Sciences at Westlake University.

摘　　要：The hysteresis of magnetoresistance observed in superconductors is of great interest due to its potential connectionwith unconventional superconductivity.In this study,we perform electrical transport measurements on kagome superconductorCsV_(3)Sb_(5)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 superconductingtransition temperature(T_(c)).As T approaches T_(c),similar weak hysteresis is also detected by applying a smallcurrent.Various scenarios are discussed,with particular focus on the effects of vortex pinning and the presence of timereversal-symmtery-breaking superconducting domains.Our findings support the latter,hinting at chiral superconductivityin kagome superconductors.

关 键 词：HYSTERESIS MAGNETORESISTANCE kagome superconductor chiral superconductor 

分 类 号：O469[理学—凝聚态物理]