Comprehensive theory of second-order spin photocurrents

@article{Lihm2022ComprehensiveTO,
  title={Comprehensive theory of second-order spin photocurrents},
  author={Jae-Mo Lihm and Cheol-Hwan Park},
  journal={Physical Review B},
  year={2022}
}
The spin photocurrents, direct currents induced by light, hold great promise for introducing new elements to spintronics. However, a general theory for spin photocurrents in real materials which is applicable to systems with spin-orbit coupling or noncollinear magnetism is absent. Here, we develop such a general theory of second-order spin photocurrents. We find that the secondorder spin photocurrents can be classified into Drude, Berry curvature dipole, shift, injection, and rectification… 

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