Theory of shift current in Anderson insulator

@article{Ishizuka2020TheoryOS,
  title={Theory of shift current in Anderson insulator},
  author={Hiroaki Ishizuka and Naoto Nagaosa},
  journal={arXiv: Mesoscale and Nanoscale Physics},
  year={2020}
}
Shift current is a photovoltaic current in bulk noncentrosymmetric insulator. Studies on shift current have so far focused on the extended Bloch waves, such as in semiconductors and perovskites. In contrast, it is unknown whether the localized wavefunctions support the dc photocurrent. Here, we show theoretically that the dc shift current appears in a noncentrosymmetric disordered one-dimensional insulator with random potential. When the light illuminates the entire sample, the photocurrent… 

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