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arXiv 2203.03754cond-mat.mes-hallcond-mat.str-el
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$\mathcal{PT}$对称共线磁体中的非线性自旋霍尔效应

Nonlinear spin Hall effect in $\mathcal{PT}$-symmetric collinear magnets

Satoru Hayami, Megumi Yatsushiro, Hiroaki Kusunose

摘要:

我们从理论上研究了$\mathcal{PT}$对称反铁磁金属中的非线性自旋霍尔效应,它是一种有效的自旋电流发生器。我们阐明了自旋相关的Berry曲率偶极子是非线性自旋霍尔效应的微观起源,它在没有相对论自旋轨道耦合、均匀磁化和自旋分裂能带结构的情况下变得非零.通过分析一个没有自旋轨道耦合的微观反铁磁模型,阐明了非线性自旋霍尔电导率增强的必要条件和跳跃过程.我们还提供了一个完整的表格,包括有用的对应关系的内尔矢量,奇宇称多极,非线性自旋电导率张量,和候选材料在所有的$\mathcal{PT}$对称的黑白磁点群。

英文摘要:

We theoretically investigate a nonlinear spin Hall effect in $\mathcal{PT}$-symmetric antiferromagnetic metals, which serve as an efficient spin current generator. We elucidate that an emergent spin-dependent Berry curvature dipole is a microscopic origin of the nonlinear spin Hall effect, which becomes nonzero with neither relativistic spin-orbit coupling, uniform magnetization, nor spin-split band structure. By analyzing a microscopic antiferromagnetic model without spin-orbit coupling for an intuitive understanding of the phenomena, we elucidate essential hopping processes and a condition to enhance the nonlinear spin Hall conductivity. We also provide a complete table to include useful correspondence among the Néel vector, odd-parity multipoles, nonlinear spin conductivity tensor, and candidate materials in all the $\mathcal{PT}$-symmetric black-and-white magnetic point groups.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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