Quantum Anomalous Hall Effect in Graphene from Rashba and Exchange Effects

Details Quantum Anomalous Hall Effect in Graphene from Rashba and Exchange Effects Quantum Anomalous Hall Effect in Graphene from Rashba and Exchange Effects

2010-05-10

arxiv.org/abs/1005.1672v2

Phys. Rev. B 82, 161414 (2010)

Physics

Condensed Matter

Materials Science

4 papges, 5 figures

Scientific paper

10.1103/PhysRevB.82.161414

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 non-zero 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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