Fate of quantum anomalous Hall effect in the presence of external magnetic fields and particle-hole asymmetry

  title={Fate of quantum anomalous Hall effect in the presence of external magnetic fields and particle-hole asymmetry},
  author={Jan B{\"o}ttcher and Christian Tutschku and Ewelina M. Hankiewicz},
  journal={Physical Review B},
The quantum anomalous Hall (QAH) effect, a condensed matter analog of the parity anomaly, is characterized by a quantized Hall conductivity in the absence of an external magnetic field. However, it has been recently shown that, even in the presence of Landau levels, the QAH effect can be distinguished from the conventional quantum Hall (QH) effect due to the parity anomaly. As a signature of this effect, we predicted coexistent counterpropagating QAH and QH edge states. In the present work, we… 
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