Mobility edges in off-diagonal disordered tight-binding models

  title={Mobility edges in off-diagonal disordered tight-binding models},
  author={Tongqi Liu and Hao Guo},
  journal={Physical Review B},
We study one-dimensional tight-binding models with a slowly varying, incommensurate off-diagonal modulation on the hopping amplitude. Interestingly, we find that the mobility edges can appear only when the off-diagonal (hopping) disorder is included, which is different from the known results induced by the diagonal disorder. We further study the situation where the off-diagonal and diagonal disorder terms (the incommensurate potential) are both included and find that the locations of mobility… 

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