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.
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)
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).
