Robust zero modes in disordered two-dimensional honeycomb lattice with Kekule bond ordering

Robustness of zero-modes of two-dimensional Dirac fermions is examined numerically for the honeycomb lattice in the presence of Kekule bond ordering. The split n = 0 Landau levels in a mag-netic field as well as the zero-modes generated by topological defects in the Kekule ordering are shown to exhibit anoma-lous robustness against disorder when the chiral symmetry is respected. (C) 2021 Elsevier Inc. All rights reserved.

Automated summary

The robustness of zero-modes of two-dimensional Dirac fermions on a honeycomb lattice with Kekule bond ordering is examined numerically. The split n = 0 Landau levels in a magnetic field and the zero-modes generated by topological defects in the Kekule ordering exhibit anomalous robustness against disorder, especially when chiral symmetry is respected.