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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

625 Citations (Scopus)

Abstract

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.

Original language	English
Article number	161414
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	82
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevB.82.161414
Publication status	Published - 20 Oct 2010
Externally published	Yes

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10.1103/PhysRevB.82.161414

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Qiao, Z., Yang, S. A., Feng, W., Tse, W. K., Ding, J., Yao, Y., Wang, J., & Niu, Q. (2010). Quantum anomalous Hall effect in graphene from Rashba and exchange effects. Physical Review B - Condensed Matter and Materials Physics, 82(16), Article 161414. https://doi.org/10.1103/PhysRevB.82.161414

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abstract = "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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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

PY - 2010/10/20

Y1 - 2010/10/20

N2 - 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.

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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JO - Physical Review B - Condensed Matter and Materials Physics

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Quantum anomalous Hall effect in graphene from Rashba and exchange effects

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