Microscopic mechanism for intrinsic nonlinear anomalous Hall conductivity in noncollinear antiferromagnetic metals

Article

关键词: MAGNETIC-STRUCTURE;    NEUTRON-DIFFRACTION;    PHASE;    EVOLUTION;   

DOI  :  10.1103/PhysRevB.107.155109

来源: SCIE

【 摘 要 】

We theoretically investigate an intrinsic nonlinear anomalous Hall effect (INAHE) in space-time (PT) symmetric antiferromagnetic metals. The INAHE is characterized by an asymmetric and nondissipative part of the second-order electric conductivity tensor in the clean limit in contrast to the Drude-type symmetric conductivity tensor with dissipation. By introducing a multipole description, we show that the emergence of the INAHE is due to active odd-parity magnetic quadrupoles or magnetic toroidal dipoles under magnetic orderings. In order to clarify the microscopic origin of the INAHE, we specifically consider a fundamental tight-binding model of a three-dimensional tetragonal system. We demonstrate that the INAHE arises from the effective coupling between magnetic ordering and antisymmetric spin-orbit interaction. We also discuss essential electron hopping paths driving the INAHE.

【 授权许可】

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