Testing topological protection of edge states in hexagonal quantum spin Hall candidate materials

doi:10.1103/PhysRevB.98.161407

	Testing topological protection of edge states in hexagonal quantum spin Hall candidate materials
	Dominguez, Fernando 1; Scharf, Benedikt 1; Li, Gang2 ; Schaefer, Joerg 3,4; Claessen, Ralph 3,4; Hanke, Werner 5; Thomale, Ronny 5; Hankiewicz, Ewelina M.1
	2018-10-23
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
卷号	98 期号:16
发表状态	已发表
DOI	10.1103/PhysRevB.98.161407
摘要	We analyze the detailed structure of topological edge mode protection occurring in hexagonal quantum spin Hall (QSH) materials. We focus on bismuthene, antimonene, and arsenene on a SiC substrate, which, due to their large bulk gap, may offer new opportunities for room-temperature QSH applications. While time-reversal symmetry is responsible for the principal symmetry protected character of QSH states, the hexagonal edge terminations yield further aspects of crystal symmetry which affect the topological protection. We show that armchair QSH edge states remain gapless under an in-plane magnetic field in the direction along the edge, a hallmark of their topological crystalline protection. In contrast, an out-of-plane magnetic field opens a gap of the order of a few meV within realistic ranges of the parameters. We use these intriguing signatures of armchair QSH edge states to predict experimentally testable fingerprints of their additional topological crystalline character and their helicity emerging in tunneling spectroscopy and ballistic magnetotransport.
收录类别	SCI ; SCIE
语种	英语
资助项目	European Research Council[ERC-StG-Thomale-TOPOLECTRICS-336012]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000448049300004
出版者	AMER PHYSICAL SOC
WOS关键词	INSULATOR ; GRAPHENE ; WELLS
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/28183
专题	物质科学与技术学院_PI研究组_李刚组
通讯作者	Dominguez, Fernando
作者单位	1.Univ Wurzburg, TP4, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany 2.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 3.Univ Wurzburg, Phys Inst, D-97074 Wurzburg, Germany 4.Univ Wurzburg, Rontgen Ctr Complex Mat Syst, D-97074 Wurzburg, Germany 5.Univ Wurzburg, Inst Theoret Phys & Astrophys, TP1, D-97074 Wurzburg, Germany
推荐引用方式 GB/T 7714	Dominguez, Fernando,Scharf, Benedikt,Li, Gang,et al. Testing topological protection of edge states in hexagonal quantum spin Hall candidate materials[J]. PHYSICAL REVIEW B,2018,98(16).
APA	Dominguez, Fernando.,Scharf, Benedikt.,Li, Gang.,Schaefer, Joerg.,Claessen, Ralph.,...&Hankiewicz, Ewelina M..(2018).Testing topological protection of edge states in hexagonal quantum spin Hall candidate materials.PHYSICAL REVIEW B,98(16).
MLA	Dominguez, Fernando,et al."Testing topological protection of edge states in hexagonal quantum spin Hall candidate materials".PHYSICAL REVIEW B 98.16(2018).