Quantum Transport Evidence of Topological Band Structures of Kagome Superconductor CsV3Sb5
Yang Fu (付阳), Ningning Zhao (赵宁宁), Zheng Chen (陈正), Qiangwei Yin (殷蔷薇), Zhijun Tu (涂志俊), Chunsheng Gong (龚春生), Chuanying Xi (郗传英), Xiangde Zhu (朱相德), Yuping Sun (孙玉平), Kai Liu (刘凯), Hechang Lei (雷和畅)
DOI 10.1103/PhysRevLett.127.207002 · Physical Review Letters
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Abstract
We report the transport properties of kagome superconductor CsV3Sb5 single crystals at magnetic field up to 32 T. The Shubnikov–de Haas oscillations emerge at low temperature and four frequencies of Fα=27 T, Fβ=73 T, Fε=727 T, and Fη=786 T with relatively small cyclotron masses are observed. For Fβ and Fε, the Berry phases are close to π, providing clear evidence of nontrivial topological band structures of CsV3Sb5. Furthermore, the consistence between theoretical calculations and experimental results implies that these frequencies can be assigned to the Fermi surfaces locating near the boundary of Brillouin zone and confirms that the structure with an inverse Star of David distortion could be the most stable structure at charge density wave state. These results will shed light on the nature of correlated topological physics in kagome material CsV3Sb5.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CsV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.5 | Pressure not reported | zero_resistance |
| CsV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.5 | Pressure not reported | onset |
| AV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | 2 GPa | unknown |
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