We report a continuous phase transition between quantum-anomalous-Hall and trivial-insulator phases in a magnetic topological insulator upon magnetization rotation. The Hall conductivity transits from one plateau of quantized Hall conductivity e2/h to the other plateau of zero Hall conductivity. The transition curves taken at various temperatures cross almost at a single point, exemplifying the critical behavior of the transition. The slope of the transition curves follows a power-law temperature dependence with a critical exponent of −0.61. This suggests a common underlying origin in the plateau transitions between the QAH and quantum Hall systems, which is a percolation of one-dimensional chiral edge channels.
@article{arxiv.1808.08930,
title = {Topological quantum phase transition in magnetic topological insulator upon magnetization rotation},
author = {Minoru Kawamura and Masataka Mogi and Ryutaro Yoshimi and Atsushi Tsukazaki and Yusuke Kozuka and Kei. S. Takahashi and Masashi Kawasaki and Yoshinori Tokura},
journal= {arXiv preprint arXiv:1808.08930},
year = {2018}
}