Dissipative edge transport in disordered axion insulator films
Dissipative edge transport in disordered axion insulator films
We investigate the role of disorder in the edge transport of axion insulator films. We predict by first-principles calculations that even-number-layer ${\mathrm{MnBi}}_{2}{\mathrm{Te}}_{4}$ have gapped helical edge states. The random potential will dramatically modify the edge spectral function to become gapless. However, such gapless helical state here is fundamentally different from …