%0 Journal Article
%T Valley-Polarized Quantum Anomalous-Hall Effects in Silicene
%A Hui Pan
%A Zhenshan Li
%A Cheng-Cheng Liu
%A Guobao Zhu
%A Zhenhua Qiao
%A Yugui Yao
%J Physics
%D 2013
%I arXiv
%R 10.1103/PhysRevLett.112.106802
%X We demonstrate a new quantum state of matter---valley-polarized quantum anomalous Hall effect in monolayer silicene. In the presence of extrinsic Rashba spin-orbit coupling and exchange field, monolayer silicene can host a quantum anomalous-Hall state with Chern number C=2. We find that through tuning Rashba spin-orbit coupling, a topological phase transition gives rise to a valley polarized quantum anomalous Hall state, i.e. a quantum state which exhibits electronic properties of both quantum valley-Hall effect (valley Chern number C_V=3) and quantum anomalous Hall effect with C=-1.
%U http://arxiv.org/abs/1304.8076v1