Graphene-like Dirac states and quantum spin Hall insulators in square-octagonal MX2 (M = Mo, W; X = S, Se, Te) isomers

doi:10.1103/PhysRevB.92.165421

	Graphene-like Dirac states and quantum spin Hall insulators in square-octagonal MX2 (M = Mo, W; X = S, Se, Te) isomers
	Sun, Yan 1; Felser, Claudia 1; Yan, Binghai1,2,3,4
	2015-10-16
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
卷号	92 期号:16
发表状态	已发表
DOI	10.1103/PhysRevB.92.165421
摘要	We studied the square-octagonal lattice of the transition metal dichalcogenide MX2 (with M =Mo,W; X = S, Se, and Te), as an isomer of the normal hexagonal compound of MX2. By band-structure calculations, we observe the graphene-like Dirac band structure in a rectangular lattice of MX2 with nonsymmorphic space group symmetry. Two bands with van Hove singularity points cross each at the Fermi energy, leading to two Dirac cones that locate at opposite momenta. Spin-orbit coupling can open a gap at these Dirac points, inside which gapless topological edge states exists as the quantum spin Hall (QSH) effect, the 2D topological insulator.
收录类别	SCI
语种	英语
资助项目	ERC[291472]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000362897500008
出版者	AMER PHYSICAL SOC
WOS关键词	GRAIN-BOUNDARIES ; TRANSITION
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/2109
专题	物质科学与技术学院_PI研究组_颜丙海组
通讯作者	Sun, Yan
作者单位	1.Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany 2.Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany 3.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China 4.CAS Shanghai Sci Res Ctr, Shanghai 201203, Peoples R China
推荐引用方式 GB/T 7714	Sun, Yan,Felser, Claudia,Yan, Binghai. Graphene-like Dirac states and quantum spin Hall insulators in square-octagonal MX2 (M = Mo, W; X = S, Se, Te) isomers[J]. PHYSICAL REVIEW B,2015,92(16).
APA	Sun, Yan,Felser, Claudia,&Yan, Binghai.(2015).Graphene-like Dirac states and quantum spin Hall insulators in square-octagonal MX2 (M = Mo, W; X = S, Se, Te) isomers.PHYSICAL REVIEW B,92(16).
MLA	Sun, Yan,et al."Graphene-like Dirac states and quantum spin Hall insulators in square-octagonal MX2 (M = Mo, W; X = S, Se, Te) isomers".PHYSICAL REVIEW B 92.16(2015).