Testing topological protection of edge states in hexagonal quantum spin Hall candidate materials
2018-10-23
Source PublicationPHYSICAL REVIEW B
ISSN2469-9950
Volume98Issue:16
Status已发表
DOI10.1103/PhysRevB.98.161407
AbstractWe 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.
Indexed BySCI ; SCIE
Language英语
Funding ProjectEuropean Research Council[ERC-StG-Thomale-TOPOLECTRICS-336012]
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000448049300004
PublisherAMER PHYSICAL SOC
WOS KeywordINSULATOR ; GRAPHENE ; WELLS
Original Document TypeArticle
Citation statistics
Document Type期刊论文
Identifierhttps://kms.shanghaitech.edu.cn/handle/2MSLDSTB/28183
Collection物质科学与技术学院_PI研究组_李刚组
Corresponding AuthorDominguez, Fernando
Affiliation
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
Recommended Citation
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).
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