Electronic structure and spin-orbit coupling in ternary transition metal chalcogenides Cu2TlX (2) (X = Se, Te)
2022-03
发表期刊CHINESE PHYSICS B (IF:1.5[JCR-2023],1.4[5-Year])
ISSN1674-1056
EISSN2058-3834
卷号31期号:3
发表状态已发表
DOI10.1088/1674-1056/ac3ecd
摘要

Ternary transition metal chalcogenides provide a rich platform to search and study intriguing electronic properties. Using angle-resolved photoemission spectroscopy and ab initio calculation, we investigate the electronic structure of Cu2TlX (2) (X = Se, Te), ternary transition metal chalcogenides with quasi-two-dimensional crystal structure. The band dispersions near the Fermi level are mainly contributed by the Te/Se p orbitals. According to our ab-initio calculation, the electronic structure changes from a semiconductor with indirect band gap in Cu2TlSe2 to a semimetal in Cu2TlTe2, suggesting a band-gap tunability with the composition of Se and Te. By comparing ARPES experimental data with the calculated results, we identify strong modulation of the band structure by spin-orbit coupling in the compounds. Our results provide a ternary platform to study and engineer the electronic properties of transition metal chalcogenides related to large spin-orbit coupling.

关键词transition metal chalcogenides spin-orbit coupling electronic structure angle-resolved photoemission spectroscopy (ARPES)
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收录类别SCI ; SCIE ; EI
语种英语
资助项目National Natural Science Foundation of China[11774190]
WOS研究方向Physics
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000765541700001
出版者IOP Publishing Ltd
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文献类型期刊论文
条目标识符https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/162940
专题物质科学与技术学院
物质科学与技术学院_PI研究组_柳仲楷组
物质科学与技术学院_特聘教授组_陈宇林
通讯作者Chen, Yulin
作者单位
1.Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
2.Nanjing Univ, Dept Mat Sci & Engn, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
3.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
4.Chinese Acad Sci, Shanghai Sci Res Ctr, Shanghai 201210, Peoples R China
5.ShanghaiTech Lab Topol Phys, Shanghai 200031, Peoples R China
6.Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China
7.Univ Oxford, Dept Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England
通讯作者单位物质科学与技术学院;  上海科技大学
推荐引用方式
GB/T 7714
Qin, Na,Du, Xian,Lv, Yangyang,et al. Electronic structure and spin-orbit coupling in ternary transition metal chalcogenides Cu2TlX (2) (X = Se, Te)[J]. CHINESE PHYSICS B,2022,31(3).
APA Qin, Na.,Du, Xian.,Lv, Yangyang.,Kang, Lu.,Yin, Zhongxu.,...&Chen, Yulin.(2022).Electronic structure and spin-orbit coupling in ternary transition metal chalcogenides Cu2TlX (2) (X = Se, Te).CHINESE PHYSICS B,31(3).
MLA Qin, Na,et al."Electronic structure and spin-orbit coupling in ternary transition metal chalcogenides Cu2TlX (2) (X = Se, Te)".CHINESE PHYSICS B 31.3(2022).
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