Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface
文献类型：期刊论文
| 作者 | Zhang, HJ ; Liu, CX ; Qi, XL ; Dai, X ; Fang, Z ; Zhang, SC |
| 刊名 | NATURE PHYSICS
 |
| 出版日期 | 2009 |
| 卷号 | 5期号:6页码:438 |
| 关键词 | HGTE QUANTUM-WELLS ELECTRONIC-STRUCTURE SPIN TRANSITION PHASE |
| ISSN号 | 1745-2473 |
| 通讯作者 | Zhang, SC (reprint author), Stanford Univ, Dept Phys, McCullough Bldg, Stanford, CA 94305 USA. |
| 中文摘要 | Topological insulators are new states of quantum matter in which surface states residing in the bulk insulating gap of such systems are protected by time-reversal symmetry. The study of such states was originally inspired by the robustness to scattering of conducting edge states in quantum Hall systems. Recently, such analogies have resulted in the discovery of topologically protected states in two-dimensional and three-dimensional band insulators with large spin-orbit coupling. So far, the only known three-dimensional topological insulator is BixSb1-x, which is an alloy with complex surface states. Here, we present the results of first-principles electronic structure calculations of the layered, stoichiometric crystals Sb2Te3, Sb2Se3, Bi2Te3 and Bi2Se3. Our calculations predict that Sb2Te3, Bi2Te3 and Bi2Se3 are topological insulators, whereas Sb2Se3 is not. These topological insulators have robust and simple surface states consisting of a single Dirac cone at the Gamma point. In addition, we predict that Bi2Se3 has a topologically non-trivial energy gap of 0.3 eV, which is larger than the energy scale of room temperature. We further present a simple and unified continuum model that captures the salient topological features of this class of materials. |
| 收录类别 | SCI |
| 资助信息 | NSF of China; National Basic Research Program of China [2007CB925000]; International Science and Technology Cooperation Program of China [2008DFB00170]; US Department of Energy, Office of Basic Energy Sciences [DE-AC02-76SF00515] |
| 语种 | 英语 |
| 公开日期 | 2013-09-23 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/45981]  |
| 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 | Zhang, HJ,Liu, CX,Qi, XL,et al. Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface[J]. NATURE PHYSICS,2009,5(6):438. |
| APA | Zhang, HJ,Liu, CX,Qi, XL,Dai, X,Fang, Z,&Zhang, SC.(2009).Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface.NATURE PHYSICS,5(6),438. |
| MLA | Zhang, HJ,et al."Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface".NATURE PHYSICS 5.6(2009):438. |
入库方式： OAI收割
来源：物理研究所
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