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| Testing topological protection of edge states in hexagonal quantum spin Hall candidate materials | |
| 2018-10-23 | |
| Source Publication | PHYSICAL REVIEW B
 |
| ISSN | 2469-9950 |
| Volume | 98Issue:16 |
| Status | 已发表 |
| DOI | 10.1103/PhysRevB.98.161407 |
| Abstract | 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. |
| Indexed By | SCI ; SCIE |
| Language | 英语 |
| Funding Project | European Research Council[ERC-StG-Thomale-TOPOLECTRICS-336012] |
| WOS Research Area | Materials Science ; Physics |
| WOS Subject | Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter |
| WOS ID | WOS:000448049300004 |
| Publisher | AMER PHYSICAL SOC |
| WOS Keyword | INSULATOR ; GRAPHENE ; WELLS |
| Original Document Type | Article |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://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 Author | Dominguez, 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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