Multitype Dirac fermions protected by orthogonal glide symmetries in a noncentrosymmetric system

doi:10.1103/PhysRevB.102.041201

	Multitype Dirac fermions protected by orthogonal glide symmetries in a noncentrosymmetric system
	Xia, Yunyouyou1,2,3 ; Cai, Xiaochan1 ; Li, Gang1,4
	2020-07-01
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
EISSN	2469-9969
卷号	102 期号:4
发表状态	已发表
DOI	10.1103/PhysRevB.102.041201
摘要	Compared to inversion-symmetric systems, the emerging bulk Dirac point (DP) in noncentrosymmetric systems is much harder and its symmetry-protection mechanism is poorly understood. In this Rapid Communication, we propose that orthogonal glide symmetries can protect two distinct types of bulk anisotropic DPs. One is the ordinary anisotropic DP that is doubly degenerate only along one invariant axis, which results from symmetry-protected accidental band crossing. The other one is a symmetry-enforced DP fixed at a non-time-reversal-invariant point, which is doubly degenerate at three orthogonal directions. This unique topological phase is exemplified by KSnSe2 in space group 108. Our work not only unveils a unique symmetry-protection mechanism but also provides a material candidate for exploring multitype Dirac fermions in noncentrosymmetric systems.
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收录类别	SCI ; SCIE ; EI
语种	英语
资助项目	National Key R&D Program of China[2017YFE0131300] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA18010000]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000544516600001
出版者	AMER PHYSICAL SOC
WOS关键词	QUASI-PARTICLE INTERFERENCE ; MAJORANA FERMIONS ; SEMIMETAL ; SCHEMES ; CATALOG
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/122048
专题	物质科学与技术学院_博士生物质科学与技术学院_PI研究组_李刚组物质科学与技术学院_硕士生
通讯作者	Li, Gang
作者单位	1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.ShanghaiTech Univ, ShanghaiTech Lab Topol Phys, Shanghai 201210, Peoples R China
第一作者单位	物质科学与技术学院
通讯作者单位	物质科学与技术学院; 上海科技大学
第一作者的第一单位	物质科学与技术学院
推荐引用方式 GB/T 7714	Xia, Yunyouyou,Cai, Xiaochan,Li, Gang. Multitype Dirac fermions protected by orthogonal glide symmetries in a noncentrosymmetric system[J]. PHYSICAL REVIEW B,2020,102(4).
APA	Xia, Yunyouyou,Cai, Xiaochan,&Li, Gang.(2020).Multitype Dirac fermions protected by orthogonal glide symmetries in a noncentrosymmetric system.PHYSICAL REVIEW B,102(4).
MLA	Xia, Yunyouyou,et al."Multitype Dirac fermions protected by orthogonal glide symmetries in a noncentrosymmetric system".PHYSICAL REVIEW B 102.4(2020).