Multi-Weyl Topological Semimetals Stabilized by Point Group Symmetry
文献类型：期刊论文
| 作者 | Fang, C ; Gilbert, MJ ; Dai, X ; Bernevig, BA |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2012 |
| 卷号 | 108期号:26 |
| ISSN号 | 0031-9007 |
| 通讯作者 | Fang, C: Princeton Univ, Dept Phys, Princeton, NJ 08544 USA. |
| 中文摘要 | We perform a complete classification of two-band k . p theories at band crossing points in 3D semimetals with n-fold rotation symmetry and broken time-reversal symmetry. Using this classification, we show the existence of new 3D topological semimetals characterized by C-4,C-6-protected double-Weyl nodes with quadratic in-plane (along k(x,y)) dispersion or C-6-protected triple-Weyl nodes with cubic in-plane dispersion. We apply this theory to the 3D ferromagnet HgCr2Se4 and confirm it is a double-Weyl metal protected by C-4 symmetry. Furthermore, if the direction of the ferromagnetism is shifted away from the [001] axis to the [111] axis, the double-Weyl node splits into four single Weyl nodes, as dictated by the point group S-6 of that phase. Finally, we discuss experimentally relevant effects including the splitting of multi-Weyl nodes by applying a C-n breaking strain and the surface Fermi arcs in these new semimetals. |
| 收录类别 | SCI |
| 资助信息 | ONR [N0014-11-1-0728, N00014-11-1-0635]; AFOSR [FA9550-10-1-0459]; NSF [DMR-095242]; Darpa [N66001-11-1-4110]; David and Lucile Packard Foundation; NSF China; 973 Program of China [2011CBA00108] |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/42435]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Fang, C,Gilbert, MJ,Dai, X,et al. Multi-Weyl Topological Semimetals Stabilized by Point Group Symmetry[J]. PHYSICAL REVIEW LETTERS,2012,108(26). |
| APA | Fang, C,Gilbert, MJ,Dai, X,&Bernevig, BA.(2012).Multi-Weyl Topological Semimetals Stabilized by Point Group Symmetry.PHYSICAL REVIEW LETTERS,108(26). |
| MLA | Fang, C,et al."Multi-Weyl Topological Semimetals Stabilized by Point Group Symmetry".PHYSICAL REVIEW LETTERS 108.26(2012). |
入库方式： OAI收割
来源：物理研究所
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