The de Haas-van Alphen quantum oscillations in the kagome metal RbTi3Bi5

董自仙 ¹石磊 ¹王彬 ¹霍梦五 ¹黄星 ¹黄潮欣 ¹马培跃 ¹张云蔚 ¹沈冰 ¹王猛¹

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作者信息

1. Center for Neutron Science and Technology,Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices,School of Physics,Sun Yat-Sen University,Guangzhou 510275,China
折叠

Abstract

The kagome system has attracted great interest in condensed matter physics due to its unique structure that can host various exotic states such as superconductivity(SC),charge density waves(CDWs)and nontrivial topological states.The topological semimetal RbTi3Bi5 consisting of a Ti kagome layer shares a similar crystal structure to the topological correlated materials AV3Sb5(A=K,Rb,Cs)but without the absence of CDW and SC.Systematic de Haas-van Alphen oscillation measurements are performed on single crystals of RbTi3Bi5 to pursue nontrivial topological physics and exotic states.Combining this with theoretical calculations,the detailed Fermi surface topology and band structure are investigated.A two-dimensional Fermi pocket β is revealed with a light effective mass,consistent with the semimetal predictions.The Landau fan diagram of RbTi3Bi5 reveals a zero Berry phase for the β oscillation in contrast to that of CsTi3Bi5.These results suggest that kagome RbTi3Bi5 is a good candidate for exploring nontrivial topological exotic states and topological correlated physics.

Key words

oscillation/Fermi surface/band structure

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基金项目

National Key Research and Development Program of China(2023YFA1406500)

National Natural Science Foundation of China(12174454)

National Natural Science Foundation of China(U2130101)

National Natural Science Foundation of China(92165204)

Guangdong Basic and Applied Basic Research Funds(2024B1515020040)

Guangdong Basic and Applied Basic Research Funds(2022A1515010035)

Guangzhou Basic and Applied Basic Research Funds(2024A04J6417)

Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices(2022B1212010008)

出版年

2024

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

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