Quantum anomalous Hall effect in graphene from Rashba and exchange effects

Zhenhua Qiao; Shengyuan A. Yang; Wanxiang Feng; Wang Kong Tse; Jun Ding; Yugui Yao; Jian Wang; Qian Niu

doi:10.1103/PhysRevB.82.161414

Quantum anomalous Hall effect in graphene from Rashba and exchange effects

Zhenhua Qiao^*, Shengyuan A. Yang, Wanxiang Feng, Wang Kong Tse, Jun Ding, Yugui Yao, Jian Wang, Qian Niu

^*此作品的通讯作者

科研成果: 期刊稿件 › 文章 › 同行评审

612 引用（Scopus）

摘要

We investigate the possibility of realizing quantum anomalous Hall effect in graphene. We show that a bulk energy gap can be opened in the presence of both Rashba spin-orbit coupling and an exchange field. We calculate the Berry curvature distribution and find a nonzero Chern number for the valence bands and demonstrate the existence of gapless edge states. Inspired by this finding, we also study, by first-principles method, a concrete example of graphene with Fe atoms adsorbed on top, obtaining the same result.

源语言	英语
文章编号	161414
期刊	Physical Review B - Condensed Matter and Materials Physics
卷	82
期	16
DOI	https://doi.org/10.1103/PhysRevB.82.161414
出版状态	已出版 - 20 10月 2010
已对外发布	是

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AU - Qiao, Zhenhua

AU - Yang, Shengyuan A.

AU - Feng, Wanxiang

AU - Tse, Wang Kong

AU - Ding, Jun

AU - Yao, Yugui

AU - Wang, Jian

AU - Niu, Qian

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AB - We investigate the possibility of realizing quantum anomalous Hall effect in graphene. We show that a bulk energy gap can be opened in the presence of both Rashba spin-orbit coupling and an exchange field. We calculate the Berry curvature distribution and find a nonzero Chern number for the valence bands and demonstrate the existence of gapless edge states. Inspired by this finding, we also study, by first-principles method, a concrete example of graphene with Fe atoms adsorbed on top, obtaining the same result.

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Quantum anomalous Hall effect in graphene from Rashba and exchange effects

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