doi:

DOI: 10.3724/SP.J.1249.2014.06551

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2014/31:6 PP.551-560

Recent progress on quantum anomalous Hall effect in graphene


Abstract:
Quantum anomalous Hall effect is a physical phenomenon of two-dimensional systems characterized by the insulating bulk states and chirally propagating gapless edge modes. Different from the quantum Hall effect caused by quantized Landau-level due to the strong magnetic field, the quantum anomalous Hall effect can be realized by the joint effect of spin-orbit coupling and local magnetization in the absence of Landau-level. In this paper, we, after briefly introducing the history and current status of the quantum anomalous Hall effect, mainly focus on the graphene which is a famous two-dimensional material possesses intriguing electronic and magnetic properties. We first give a simple theoretical model where the exchange field is present to break the time reversal symmetry and then the Rashba spin-orbit coupling opens an energy gap to realize quantum anomalous Hall effect in graphene. Then we further explain the microscopic mechanism. At last, we discuss several possible experimental prototypes aimed at realizing the quantum anomalous Hall effect in realistic.

Key words:condensed matter physics,graphene,quantum anomalous Hall effect,Rashba spin-orbit coupling,exchange field,topological quantum state

ReleaseDate:2016-04-08 11:02:52



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