Anomalous Hall effect and two-dimensional Fermi surfaces in the charge-density-wave state of kagome metal RbV3Sb5

Wang，Lingfei1; Zhang，Wei1; Wang，Zheyu1; Poon，Tsz Fung1; Wang，Wenyan1; Tsang，Chun Wai1; Xie，Jianyu1; Zhou，Xuefeng2; Zhao，Yusheng2; Wang，Shanmin2; Lai，Kwing To1,3; Goh，Swee K.1

2023-04-01

10.1088/2515-7639/acba46

JPhys Materials   Impact Factor & Quartile

2515-7639

AVSb (A = Cs, K, Rb) is a recently discovered superconducting system ( T c ∼ 0.9 -2.5 K) in which the vanadium atoms adopt the kagome structure. Intriguingly, these systems enter a charge-density-wave (CDW) phase ( T C D W ∼ 80 -100 K), and further evidence shows that the time-reversal symmetry is broken in the CDW phase. Concurrently, the anomalous Hall effect (AHE) has been observed in KVSb and CsVSb inside the novel CDW phase. Here, we report a comprehensive study of a high-quality RbVSb single crystal with magnetotransport measurements. Our data demonstrate the emergence of the AHE in RbVSb when the CDW state develops. The magnitude of the anomalous Hall resistivity in the low temperature limit is comparable to the reported values in KVSb and CsVSb. The magnetoresistance channel further reveals a rich spectrum of quantum oscillation frequencies, many of which have not been reported before. In particular, a large quantum oscillation frequency (2235 T), which occupies ∼56% of the Brillouin zone area, was recorded. For the quantum oscillation frequencies with sufficient signal-to-noise ratio, we further perform field angle-dependent measurements, and our data indicate two-dimensional Fermi surfaces in RbVSb. Our results provide indispensable information for understanding the AHE and band structure in kagome metal AVSb

anomalous Hall effect Fermi surface kagome metal

SCI

English

Others

WOS:000942570400001

2-s2.0-85149657377

Scopus

1.Department of Physics,The Chinese University of Hong Kong,Shatin,Hong Kong
2.Department of Physics,Southern University of Science and Technology,Shenzhen,Guangdong,China
3.Shenzhen Research Institute,The Chinese University of Hong Kong,Shatin,Hong Kong

Wang，Lingfei,Zhang，Wei,Wang，Zheyu,et al. Anomalous Hall effect and two-dimensional Fermi surfaces in the charge-density-wave state of kagome metal RbV3Sb5[J]. JPhys Materials,2023,6(2).

Wang，Lingfei.,Zhang，Wei.,Wang，Zheyu.,Poon，Tsz Fung.,Wang，Wenyan.,...&Goh，Swee K..(2023).Anomalous Hall effect and two-dimensional Fermi surfaces in the charge-density-wave state of kagome metal RbV3Sb5.JPhys Materials,6(2).

Wang，Lingfei,et al."Anomalous Hall effect and two-dimensional Fermi surfaces in the charge-density-wave state of kagome metal RbV3Sb5".JPhys Materials 6.2(2023).