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The de Haas-van Alphen quantum oscillations in the kagome metal RbTi_(3)Bi_(5)

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摘要 The kagome system has attracted great interest in condensed matter physics due to its unique structure that canhost various exotic states such as superconductivity(SC),charge density waves(CDWs)and nontrivial topological states.The topological semimetal RbTi_(3)Bi_(5)consisting of a Ti kagome layer shares a similar crystal structure to the topologicalcorrelated materials AV_(3)Sb_(5)(A=K,Rb,Cs)but without the absence of CDW and SC.Systematic de Haas-van Alphenoscillation measurements are performed on single crystals of RbTi_(3)Bi_(5)to pursue nontrivial topological physics and exoticstates.Combining this with theoretical calculations,the detailed Fermi surface topology and band structure are investigated.A two-dimensional Fermi pocket b is revealed with a light effective mass,consistent with the semimetal predictions.TheLandau fan diagram of RbTi_(3)Bi_(5)reveals a zero Berry phase for the b oscillation in contrast to that of CsTi_(3)Bi_(5).Theseresults suggest that kagome RbTi_(3)Bi_(5)is a good candidate for exploring nontrivial topological exotic states and topologicalcorrelated physics.
作者 Zixian Dong Lei Shi Bin Wang Mengwu Huo Xing Huang Chaoxin Huang Peiyue Ma Yunwei Zhang Bing Shen Meng Wang 董自仙;石磊;王彬;霍梦五;黄星;黄潮欣;马培跃;张云蔚;沈冰;王猛(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)
出处 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第10期356-361,共6页 中国物理B(英文版)
基金 supported by the National Key Research and Development Program of China(Grant No.2023YFA1406500) the National Natural Science Foundation of China(Grant Nos.12174454,U2130101,and 92165204) the Guangdong Basic and Applied Basic Research Funds(Grant Nos.2024B1515020040 and 2022A1515010035) Guangzhou Basic and Applied Basic Research Funds(Grant No.2024A04J6417) Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices(Grant No.2022B1212010008).
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