Three-Dimensional Dirac Semimetal β-PbO2

被引：11
作者：
Wang, Wei [1 ]
Deng, Linjie [1 ]
Jiao, Na [3 ]
Zhou, Pan [1 ]
Sun, Lizhong [2 ]
机构：
[1] Xiangtan Univ, Sch Mat Sci & Engn, Hunan Prov Key Lab Thin Film Mat & Devices, Xiangtan 411105, Peoples R China
[2] Xiangtan Univ, Sch Mat Sci & Engn, Key Lab Low Dimens Mat & Applicat Technol, Xiangtan 411105, Peoples R China
[3] Qufu Normal Univ, Shandong Prov Key Lab Laser Polarizat & Informat, Sch Phys Engn, Qufu 273165, Peoples R China
来源：
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS | 2017年 / 11卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Dirac semimetals; Fermi arc; surface states; topological semimetals; DISCOVERY; SCHEMES;
D O I：
10.1002/pssr.201700271
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Based on first-principles calculation, we found a new type of three-dimensional (3D) topological semimetal: beta-PbO2. When spin-orbit coupling (SOC) is ignored, beta-PbO2 behaves as a node-line semimetal, but in the presence of SOC, the system turns into 3D Dirac semimetal, and the Dirac points are protected by C-4 crystal symmetry. Moreover, the surface states and Fermi arcs on the semi-infinite edge clearly reveal its topological nature. Therefore, beta-PbO2 provides a flexible platform for exploring exotic physical phenomena of Dirac semimetals.
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页数：4
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