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

被引：7
|
作者：
Jiang, Wenxiang [1 ]
Zhu, Fengfeng [1 ]
Li, Ping [2 ]
Li, Yunlong [1 ]
Wang, Guohua [1 ]
Jing, Qiang [1 ]
Gao, Wenshuai [3 ]
Tian, Mingliang [3 ]
Ma, Jie [1 ]
Zhang, Wentao [1 ]
Luo, Weidong [1 ]
Qian, Dong [1 ,4 ]
机构：
[1] Shanghai Jiao Tong Univ, Key Lab Artificial Structures & Quantum Control, Shenyang Natl Lab Mat Sci, Minist Educ,Sch Phys & Astron, Shanghai 200240, Peoples R China
[2] Anhui Jianzhu Univ, Sch Math & Phys, Hefei 230601, Peoples R China
[3] Chinese Acad Sci, High Field Magnet Lab, Anhui Prov Key Lab Condensed Matter Phys Extreme, Hefei 230031, Peoples R China
[4] Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 200240, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2020年 / 128卷 / 13期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/5.0020622
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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.
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页数：7
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