Quantum anomalous Hall effect in graphene from Rashba and exchange effects

被引：613

作者：

Qiao, Zhenhua ^{[1
]}

Yang, Shengyuan A. ^{[1
]}

Feng, Wanxiang ^{[2
,3
]}

Tse, Wang-Kong ^{[1
]}

Ding, Jun ^{[2
,3
]}

Yao, Yugui ^{[1
,2
,3
]}

Wang, Jian ^{[4
,5
]}

Niu, Qian ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA

[2] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[4] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[5] Univ Hong Kong, Ctr Theoret & Computat Phys, Hong Kong, Hong Kong, Peoples R China

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 16期

基金：

美国国家科学基金会;

关键词：

EPITAXIAL GRAPHENE; INDUCED BANDGAP; CONDUCTANCE; PHASE;

D O I：

10.1103/PhysRevB.82.161414

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

引用

页数：4

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