Spin Fluctuations in Quantized Transport of Magnetic Topological Insulators.

  title={Spin Fluctuations in Quantized Transport of Magnetic Topological Insulators.},
  author={Yu-Hang Li and Ran Cheng},
  journal={Physical review letters},
  volume={126 2},
In magnetic topological insulators, quantized electronic transport is intertwined with spontaneous magnetic ordering, as magnetization controls band gaps, hence band topology, through the exchange interaction. We show that considering the exchange gaps at the mean-field level is inadequate to predict phase transitions between electronic states of distinct topology. Thermal spin fluctuations disturbing the magnetization can act as frozen disorders that strongly scatter electrons, reducing the… 

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