Pressure tuning of the anomalous Hall effect in the kagome superconductor CsV_(3)Sb_(5)  

作　　者：Fang-Hang Yu Xi-Kai Wen Zhi-Gang Gui Tao Wu Zhenyu Wang Zi-Ji Xiang Jianjun Ying Xianhui Chen 喻芳航;温茜凯;桂智刚;吴涛;王震宇;项子霁;应剑俊;陈仙辉(Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics,and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence in Quantum Information and Quantum Physics,Hefei 230026,China;Collaborative Innovation Center of Advanced Microstructures,Nanjing 210093,China)

机构地区：[1]Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics,and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics,University of Science and Technology of China,Hefei 230026,China [2]CAS Center for Excellence in Quantum Information and Quantum Physics,Hefei 230026,China [3]Collaborative Innovation Center of Advanced Microstructures,Nanjing 210093,China

出　　处：《Chinese Physics B》2022年第1期31-36,共6页中国物理B（英文版）

基　　金：the National Key Research and Development Program of China(Grant Nos.2019YFA0704900 and 2017YFA0303001);the Anhui Initiative in Quantum Information Technologies(Grant No.AHY160000);the Science Challenge Project of China(Grant No.TZ2016004);the Key Research Program of Frontier Sciences,Chinese Academy of Sciences(CAS)(Grant No.QYZDYSSWSLH021);the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB25000000);the National Natural Science Foundation of China(Grants Nos.11888101 and 11534010);the Collaborative Innovation Program of Hefei Science Center,CAS(Grant No.2020HSC-CIP014);the Fundamental Research Funds for the Central Universities,China(Grant No.WK3510000011).

摘　　要：Controlling the anomalous Hall effect(AHE)inspires potential applications of quantum materials in the next generation of electronics.The recently discovered quasi-2D kagome superconductor CsV_(3)Sb_(5) exhibits large AHE accompanying with the charge-density-wave(CDW)order which provides us an ideal platform to study the interplay among nontrivial band topology,CDW,and unconventional superconductivity.Here,we systematically investigated the pressure effect of the AHE in CsV_(3)Sb_(5).Our high-pressure transport measurements confirm the concurrence of AHE and CDW in the compressed CsV_(3)Sb_(5).Remarkably,distinct from the negative AHE at ambient pressure,a positive anomalous Hall resistivity sets in below 35 K with pressure around 0.75 GPa,which can be attributed to the Fermi surface reconstruction and/or Fermi energy shift in the new CDW phase under pressure.Our work indicates that the anomalous Hall effect in CsV_(3)Sb_(5) is tunable and highly related to the band structure.

关 键 词：anomalous Hall effect(AHE) charge-density-wave(CDW) kagome superconductor pressure effect 

分 类 号：O469[理学—凝聚态物理]