论文标题
非共线性抗铁磁金属中内在非线性异常电导率的微观机制
Microscopic mechanism for intrinsic nonlinear anomalous Hall conductivity in noncollinear antiferromagnetic metals
论文作者
论文摘要
从理论上讲，我们在时空（$ \ Mathcal {pt} $）对称抗fiferromagnetic金属中研究了内在的非线性异常霍尔效应（inahe）。 Inahe的特征是二阶电导率张量的不对称和非隔离部分在干净极限下与Drude型对称的电导率张量相反，并随着耗散而进行鲜明对比。通过引入多极描述，我们表明inahe的出现是由于磁有序下的主动奇数磁性四极杆或磁环偶极子引起的。为了阐明Inahe的微观起源，我们特别考虑了三维四方系统的基本紧密结合模型。我们证明了inahe源于磁有序和反对称自旋 - 轨道相互作用之间的有效耦合。我们还讨论了驱动Inahe的基本电子跳道。
We theoretically investigate an intrinsic nonlinear anomalous Hall effect (INAHE) in space-time ($\mathcal{PT}$) symmetric antiferromagnetic metals. The INAHE is characterized by an asymmetric and non-dissipative 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.
