Similarities and differences in the fermiology of kagome metals AV(3)Sb(5) (A = K, Rb, Cs) revealed by Shubnikov-de Haas oscillations

Wang, Zheyu1; Zhang, Wei1; Wang, Lingfei1; Poon, Tsz Fung1; Tsang, Chun Wai1; Wang, Wenyan1; Xie, Jianyu1; Lam, Siu Tung1; Zhou, Xuefeng2; Zhao, Yusheng2; Wang, Shanmin2; Ai, Ming-Zhong1; Lai, Kwing To1,3; Goh, Swee K. K.1

2023-07-03

10.1063/5.0145859

APPLIED PHYSICS LETTERS   影响因子和分区

0003-6951

1077-3118

Materials with AV(3)Sb(5) (A = K, Rb, Cs) stoichiometry are recently discovered kagome superconductors with the electronic structure featuring a Dirac band, van Hove singularities, and flat bands. These systems undergo anomalous charge-density-wave transitions at TCDW similar to 80-100 K, resulting in the reconstruction of the Fermi surface from the pristine phase. Although comprehensive investigations of the electronic structure via quantum oscillations (QOs) have been performed on the sister compounds CsV3Sb5 and RbV3Sb5, a detailed QO study of KV3Sb5 is so far absent. Here, we report the Shubnikov-de Haas QO study in KV3Sb5. We resolve a large number of new frequencies with the highest frequency of 2202 T (occupying similar to 54% of the Brillouin zone area in the kx-ky plane). The Lifshitz-Kosevich analysis further gives relatively small cyclotron effective masses, and the angular dependence study reveals the two-dimensional nature of the frequencies with a sufficient signal-to-noise ratio. Finally, we compare the QO spectra for all three AV(3)Sb(5) compounds collected under the same conditions, enabling us to point out the similarities and the differences across these systems. Our results fill in the gap of the QO study in KV3Sb5 and provide valuable data to understand the band structure of all three members of AV(3)Sb(5).

SCI ; EI

英语

NI论文

其他

Research Grants Council of Hong Kong["CUHK 14300419","CUHK 14301020","CUHK 14300722","A-CUHK402/19"] ; CUHK Direct Grant["4053461","4053408","4053528","4053463"] ; National Natural Science Foundation of China["12104384","12174175"] ; Shenzhen Basic Research Fund[JCYJ20190809173213150]

Physics

Physics, Applied

WOS:001025214300019

AIP Publishing

20232814393854

Antimony compounds ; Binary alloys ; Cesium compounds ; Charge density waves ; Electronic structure ; Rubidium compounds ; Signal to noise ratio

Electricity: Basic Concepts and Phenomena:701.1 ; Information Theory and Signal Processing:716.1

PHYSICS

Web of Science

1.Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen, Guangdong, Peoples R China
3.Chinese Univ Hong Kong, Shenzhen Res Inst, Shatin, Hong Kong, Peoples R China

Wang, Zheyu,Zhang, Wei,Wang, Lingfei,et al. Similarities and differences in the fermiology of kagome metals AV(3)Sb(5) (A = K, Rb, Cs) revealed by Shubnikov-de Haas oscillations[J]. APPLIED PHYSICS LETTERS,2023,123(1).

Wang, Zheyu.,Zhang, Wei.,Wang, Lingfei.,Poon, Tsz Fung.,Tsang, Chun Wai.,...&Goh, Swee K. K..(2023).Similarities and differences in the fermiology of kagome metals AV(3)Sb(5) (A = K, Rb, Cs) revealed by Shubnikov-de Haas oscillations.APPLIED PHYSICS LETTERS,123(1).

Wang, Zheyu,et al."Similarities and differences in the fermiology of kagome metals AV(3)Sb(5) (A = K, Rb, Cs) revealed by Shubnikov-de Haas oscillations".APPLIED PHYSICS LETTERS 123.1(2023).