  In this Letter, we study an Anderson-localization-induced quantized transport
in disordered Chern insulators (CIs). By investigating the disordered CIs with
a step potential, we find that the chiral interface states emerge along the
interfaces of the step potential, and the energy range for such quantized
transport can be manipulated through the potential strength. Furthermore,
numerical simulations on cases with a multi-step potential demonstrate that
such chiral state can be spatially shifted by varying the Fermi energy, and the
energy window for quantized transport is greatly enlarged. Experimentally, such
chiral interface states can be realized by imposing transverse electric field,
in which the energy window for quantized transport is much broader than the
intrinsic band gap of the corresponding CI. These phenomena are quite universal
for disordered CIs due to the direct phase transition between the CI and the
normal insulator.
