Nonlinear electric transport in odd-parity magnetic multipole systems: Application to Mn-based compounds
Nonlinear electric transport in odd-parity magnetic multipole systems: Application to Mn-based compounds
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DOI：
10.1103/physrevresearch.2.043081
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发表时间：
2020-10
期刊：
影响因子：
--
通讯作者：
Hikaru Watanabe;Y. Yanase
中科院分区：
文献类型：
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作者：
Hikaru Watanabe;Y. Yanase
宇称对称性的破坏会引起各种物理现象，如非线性输运和交叉相关响应。特别是非线性电导率在自旋轨道耦合半导体、超导体、拓扑材料等领域引起了广泛的关注，本文对具有$\mathcal{PT}$-对称性的奇宇称磁多极有序系统的非线性电导率进行了理论研究.结合微观配方和对称性分析，我们分类的$\mathcal{PT}$-对称系统以及$\mathcal{T}$-对称（非磁性）系统的非线性响应，并揭示非线性电导率独特的奇宇称磁多极系统。提出了锰基磁体的巨非线性霍尔效应、向列性辅助二向色性和磁致Berry曲率偶极效应，并在一个模型中得到了证明。
Violation of parity symmetry gives rise to various physical phenomena such as nonlinear transport and cross-correlated responses. In particular, the nonlinear conductivity has been attracting a lot of attentions in spin-orbit coupled semiconductors, superconductors, topological materials, and so on. In this paper we present theoretical study of the nonlinear conductivity in odd-parity magnetic multipole ordered systems whose $\mathcal{PT}$-symmetry is essentially distinct from the previously studied acentric systems. Combining microscopic formulation and symmetry analysis, we classify the nonlinear responses in the $\mathcal{PT}$-symmetric systems as well as $\mathcal{T}$-symmetric (non-magnetic) systems, and uncover nonlinear conductivity unique to the odd-parity magnetic multipole systems. A giant nonlinear Hall effect, nematicity-assisted dichroism and magnetically-induced Berry curvature dipole effect are proposed and demonstrated in a model for Mn-based magnets.