Electronic structure of correlated topological insulator candidate YbB6 studied by photoemission and quantum oscillation

被引：1
作者：
Zhang, T. [1 ]
Li, G. [2 ,3 ,4 ]
Sun, S. C. [1 ]
Qin, N. [1 ]
Kang, L. [1 ]
Yao, S. H. [5 ,6 ]
Weng, H. M. [3 ,4 ,7 ,8 ,9 ,10 ]
Mo, S. K. [11 ]
Li, L. [2 ]
Liu, Z. K. [12 ,13 ,14 ]
Yang, L. X. [1 ,15 ]
Chen, Y. L. [1 ,12 ,13 ,14 ,16 ]
机构：
[1] Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
[2] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
[3] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[4] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
[5] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[6] Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China
[7] Collaborat Innovat Ctr Quantum Matter, Beijing, Peoples R China
[8] Songshan Lake Mat Lab, Dongguan 523808, Peoples R China
[9] CAS Ctr Excellence Topol Quantum Computat, Beijing 100190, Peoples R China
[10] Huairou Natl Comprehens Sci Ctr, Phys Sci Lab, Beijing 101400, Peoples R China
[11] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA
[12] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
[13] CAS Shanghai Sci Res Ctr, Shanghai 201210, Peoples R China
[14] ShanghaiTech Lab Topol Phys, Shanghai 200031, Peoples R China
[15] Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China
[16] Univ Oxford, Clarendon Lab, Dept Phys, Parks Rd, Oxford OX1 3PU, England
来源：
CHINESE PHYSICS B | 2020年 / 29卷 / 01期
基金：
美国国家科学基金会; 英国工程与自然科学研究理事会; 中国国家自然科学基金; 国家重点研发计划;
关键词：
topological insulator; electronic structure; surface states;
D O I：
10.1088/1674-1056/ab6206
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Angle-resolved photoemission spectroscopy (ARPES) and torque magnetometry (TM) measurements have been carried out to study the electronic structures of a correlated topological insulator (TI) candidate YbB6. We observed clear surface states on the [001] surface centered at the Gamma over bar M over bar <i points of the surface Brillouin zone. Interestingly, the fermiology revealed by the quantum oscillation of TM measurements agrees excellently with ARPES measurements. Moreover, the band structures we observed suggest that the band inversion in YbB6 happens between the Yb-5d and B-2p bands, instead of the Yb-5d and Yb-4f bands as suggested by previous theoretical investigation, which will help settle the heavy debate regarding the topological nature of samarium/ytterbium hexaborides.
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页数：6
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