Quantum anomalous Hall effect in single-layer and bilayer graphene
文献类型：期刊论文
| 作者 | Tse, WK ; Qiao, ZH ; Yao, YG ; MacDonald, AH ; Niu, Q |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2011 |
| 卷号 | 83期号:15 |
| 关键词 | ELECTRONIC-PROPERTIES |
| ISSN号 | 1098-0121 |
| 通讯作者 | Tse, WK (reprint author), Univ Texas Austin, Dept Phys, Austin, TX 78712 USA. |
| 中文摘要 | The quantum anomalous Hall effect can occur in single- and few-layer graphene systems that have both exchange fields and spin-orbit coupling. In this paper, we present a study of the quantum anomalous Hall effect in single-layer and gated bilayer graphene systems with Rashba spin-orbit coupling. We compute Berry curvatures at each valley point and find that for single-layer graphene the Hall conductivity is quantized at sigma(xy) = 2e(2)/h, with each valley contributing a unit conductance and a corresponding chiral edge state. In bilayer graphene, we find that the quantized anomalous Hall conductivity is twice that of the single-layer case when the gate voltage U is smaller than the exchange field M, and zero otherwise. Although the Chern number vanishes when U > M, the system still exhibits a quantized valley Hall effect, with the edge states in opposite valleys propagating in opposite directions. The possibility of tuning between different topological states with an external gate voltage suggests possible graphene-based spintronics applications. |
| 收录类别 | SCI |
| 资助信息 | Welch Grant [F1473]; DOE [DE-FG03-02ER45985]; NSFC [10974231]; MOST of China [2007CB925000, 2011CBA00100] |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/51640]  |
| 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 | Tse, WK,Qiao, ZH,Yao, YG,et al. Quantum anomalous Hall effect in single-layer and bilayer graphene[J]. PHYSICAL REVIEW B,2011,83(15). |
| APA | Tse, WK,Qiao, ZH,Yao, YG,MacDonald, AH,&Niu, Q.(2011).Quantum anomalous Hall effect in single-layer and bilayer graphene.PHYSICAL REVIEW B,83(15). |
| MLA | Tse, WK,et al."Quantum anomalous Hall effect in single-layer and bilayer graphene".PHYSICAL REVIEW B 83.15(2011). |
入库方式： OAI收割
来源：物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。