Magnetoelectric response of the antiferromagnetic insulator phase in a three-dimensional correlated system with spin-orbit coupling

International Conference on Strongly Correlated Electron Systems 2014

Sekine, Akihiko^1 ; Nomura, Kentaro^1

Institute for Materials Research, Tohoku University, Sendai

980-8577, Japan^1

关键词: Antiferromagnetic insulators;    Chiral anomaly;    Correlated systems;    Effective Hamiltonian;    Half-filling;    Magnetoelectric response;    Spin-orbit couplings;    Theoretical methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012128/pdf
DOI  :  10.1088/1742-6596/592/1/012128

来源: IOP

【 摘 要 】

We theoretically investigate the antiferromagnetic insulator phase in a threedimensional correlated system with spin-orbit coupling, the Fu-Kane-Mele-Hubbard model at half-filling. We focus on the topological magnetoelectric effect which is described by the theta term. A low-energy effective Hamiltonian is derived in the antiferromagnetic insulator phase. Then with the use of a field-theoretical method, the theta term is derived as a consequence of the chiral anomaly.