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.

引用

页数：7

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