Topological response in ferromagnets

Article

关键词: HGTE QUANTUM-WELLS;    MOMENTUM-SPACE;    HALL;    INSULATORS;   

DOI  :  10.1103/PhysRevB.89.155104

来源: SCIE

【 摘 要 】

We present a theory of the intrinsic anomalous Hall effect in a model of a doped Weyl semimetal, which serves here as the simplest toy model of a generic three-dimensional metallic ferromagnet with Weyl nodes in the electronic structure. We analytically evaluate the anomalous Hall conductivity as a function of doping, which allows us to explicitly separate the Fermi-surface and non-Fermi-surface contributions to the Hall conductivity by carefully evaluating the zero-frequency and zero wave-vector limits of the corresponding response function. We show that this separation agrees with the one suggested a long time ago in the context of the quantum Hall effect by Streda [J. Phys. C 15, L717 ( 1982)].

【 授权许可】

Free