Bulk photospin effect: Calculation of electric spin susceptibility to second order in an electric field
Bulk photospin effect: Calculation of electric spin susceptibility to second order in an electric field
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DOI：
10.1103/physrevb.106.195108
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发表时间：
2022-03
影响因子：
3.7
通讯作者：
Benjamin M. Fregoso
中科院分区：
文献类型：
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作者：
Benjamin M. Fregoso
我们计算了具有二阶自旋轨道耦合的布洛赫电子的电自旋磁化率。我们发现使用线性极化电场可以在大量非磁性反演对称材料中产生非平衡自旋极化，但该过程取决于带间相干性并产生热量。在某些情况下，可以避免圆偏振加热。标准埃德尔斯坦效应和自旋取向效应在形式主义内的适当限度内得到恢复。最后，金属的电自旋敏感性与费米海的自旋多极矩成正比，费米海的自旋多极矩主导低频自旋响应。
We compute the electric spin susceptibility of Bloch electrons with spin-orbit coupling to second order. We find that it is possible to generate a nonequilibrium spin polarization in the bulk of non-magnetic inversion-symmetric materials using linearly polarized electric fields, but the process depends on interband coherence and produces heating. It may be possible to avoid heating with circular polarization in certain scenarios. The standard Edelstein effect and spin orientation effects are recovered in appropriate limits within the formalism. Finally, the electric spin susceptibility of metals has contributions proportional to spin multipole moments of the Fermi sea that dominate the low frequency spin response.