Pressure tuning of the anomalous Hall effect in the kagome superconductor CsV3Sb5

doi:10.1088/1674-1056/ac3990

中国物理B ›› 2022, Vol. 31 ›› Issue (1): 17405-017405.doi: 10.1088/1674-1056/ac3990

所属专题： SPECIAL TOPIC — Superconductivity in vanadium-based kagome materials

Pressure tuning of the anomalous Hall effect in the kagome superconductor CsV₃Sb₅

Fang-Hang Yu(喻芳航)¹, Xi-Kai Wen(温茜凯)¹, Zhi-Gang Gui(桂智刚)¹, Tao Wu(吴涛)¹, Zhenyu Wang(王震宇)¹, Zi-Ji Xiang(项子霁)¹, Jianjun Ying(应剑俊)^1,†, and Xianhui Chen(陈仙辉)^1,2,3,‡

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

收稿日期:2021-10-18 修回日期:2021-11-11 接受日期:2021-11-15 出版日期:2021-12-03 发布日期:2021-12-30
通讯作者: Jianjun Ying, Xianhui Chen E-mail:yingjj@ustc.edu.cn;chenxh@ustc.edu.cn
基金资助:
This work was supported by 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), and the Fundamental Research Funds for the Central Universities, China (Grant No. WK3510000011).

Pressure tuning of the anomalous Hall effect in the kagome superconductor CsV₃Sb₅

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

Received:2021-10-18 Revised:2021-11-11 Accepted:2021-11-15 Online:2021-12-03 Published:2021-12-30
Contact: Jianjun Ying, Xianhui Chen E-mail:yingjj@ustc.edu.cn;chenxh@ustc.edu.cn
Supported by:
This work was supported by 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), and the Fundamental Research Funds for the Central Universities, China (Grant No. WK3510000011).

1. 2022-017405-SI.pdf(652KB)

摘要/Abstract

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 CsV₃Sb₅ 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 CsV₃Sb₅. Our high-pressure transport measurements confirm the concurrence of AHE and CDW in the compressed CsV₃Sb₅. 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 CsV₃Sb₅ is tunable and highly related to the band structure.

关键词: anomalous Hall effect (AHE), charge-density-wave (CDW), kagome superconductor, pressure effect

Abstract: 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 CsV₃Sb₅ 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 CsV₃Sb₅. Our high-pressure transport measurements confirm the concurrence of AHE and CDW in the compressed CsV₃Sb₅. 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 CsV₃Sb₅ is tunable and highly related to the band structure.

Key words: anomalous Hall effect (AHE), charge-density-wave (CDW), kagome superconductor, pressure effect

中图分类号: (Effects of pressure)

74.62.Fj

71.18.+y (Fermi surface: calculations and measurements; effective mass, g factor) 71.45.Lr (Charge-density-wave systems)

Fang-Hang Yu(喻芳航), Xi-Kai Wen(温茜凯), Zhi-Gang Gui(桂智刚), Tao Wu(吴涛), Zhenyu Wang(王震宇), Zi-Ji Xiang(项子霁), Jianjun Ying(应剑俊), and Xianhui Chen(陈仙辉). Pressure tuning of the anomalous Hall effect in the kagome superconductor CsV₃Sb₅[J]. 中国物理B, 2022, 31(1): 17405-017405.

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Pressure tuning of the anomalous Hall effect in the kagome superconductor CsV₃Sb₅

Pressure tuning of the anomalous Hall effect in the kagome superconductor CsV₃Sb₅

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