Electronic structure of non-centrosymmetric PtBi2 studied by angle-resolved photoemission spectroscopy

Using high-resolution angle-resolved photoemission spectroscopy (ARPES), we have systematically studied the electronic structure of non-centrosymmetric PtBi 2 with a layered structure. Through photon energy dependent measurements, the surface state and the bulk state were identified. Consistent with...

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Bibliographic Details
Published in:Journal of applied physics 2020-10, Vol.128 (13)
Main Authors: Jiang, Wenxiang, Zhu, Fengfeng, Li, Ping, Li, Yunlong, Wang, Guohua, Jing, Qiang, Gao, Wenshuai, Tian, Mingliang, Ma, Jie, Zhang, Wentao, Luo, Weidong, Qian, Dong
Format: Article
Language:English
Subjects:
Anisotropy
Applied physics
Electronic structure
Electrons
Energy bands
Fermi surfaces
Fermions
First principles
Mathematical analysis
Photoelectric emission
Photoelectron spectroscopy
Spectroscopic analysis
Spectrum analysis
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Summary:Using high-resolution angle-resolved photoemission spectroscopy (ARPES), we have systematically studied the electronic structure of non-centrosymmetric PtBi 2 with a layered structure. Through photon energy dependent measurements, the surface state and the bulk state were identified. Consistent with the non-centrosymmetric structure, different surface states were observed on opposite PtBi 2(001) surfaces. Experimental bulk bands agree nicely with first-principle calculations. By combining ARPES and calculations, energy bands that contribute to triply degenerate point fermion were all detected. We also suggest that there are “canted” tube-like Fermi surfaces that might cause strong anisotropy in electronic transportation in non-centrosymmetric PtBi 2.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0020622