Concurrence of anomalous Hall effect and charge density wave in a superconducting topological kagome metal

被引：270

作者：

Yu, F. H. ^{[1
,2
,3
]}

Wu, T. ^{[1
,2
,3
]}

Wang, Z. Y. ^{[1
,2
,3
]}

Lei, B. ^{[1
,2
,3
]}

Zhuo, W. Z. ^{[1
,2
,3
]}

Ying, J. J. ^{[1
,2
,3
]}

Chen, X. H. ^{[1
,2
,3
,4
,5
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Dept Phys, Hefei 230026, Anhui, Peoples R China

[3] Univ Sci & Technol China, CAS Key Lab Strongly Coupled Quantum Matter Phys, Hefei 230026, Anhui, Peoples R China

[4] CAS Ctr Excellence Quantum Informat & Quantum Phy, Hefei 230026, Anhui, Peoples R China

[5] Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China

来源：

PHYSICAL REVIEW B | 2021年 / 104卷 / 04期

基金：

中国国家自然科学基金;

关键词：

WEYL; FERMIONS; LATTICE; STATE;

D O I：

10.1103/PhysRevB.104.L041103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

As one of the most fundamental physical phenomena, the anomalous Hall effect (AHE) typically occurs in ferromagnetic materials but is not expected in the conventional superconductors. Here, we have observed a giant AHE in kagome superconductor CsV3Sb5 with transition temperature (T-c) of 2.7 K. The anomalous Hall conductivity reaches up to 2.1 x 10(4)Omega(-1) cm(-1) which is larger than those observed in most of the ferromagnetic metals. Strikingly, the emergence of AHE exactly follows the higher-temperature charge-density-wave (CDW) transition with T-CDW similar to 94 K, indicating a strong correlation between the CDW state and AHE. Furthermore, AHE disappears when the CDW transition is completely suppressed at high pressure. The origin for AHE is attributed to enhanced skew scattering in the CDW state and large Berry curvature arising from the kagome lattice. These discoveries make CsV3Sb5 as an ideal platform to study the interplay among nontrivial band topology, CDW, and unconventional superconductivity.

引用

页数：7

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