Variants of the symmetry-based indicator
Mesoscale and Nanoscale Physics
2019-08-01 v1 Superconductivity
Abstract
The symmetry-based indicator [H. C. Po, A. Vishwanath, H. Watanabe, Nat. Commun. 8, 50 (2017)] is a practical tool to diagnose topological materials in the band theory. In this note, we present two directions to generalize the symmetry-based indicator for other classes of topological materials. The one is for superconductors. The careful definition of the atomic insulators and the trivial vacuum Hamiltonian yields the symmetry-based indicators specific to superconductors. The other is for ingap boundary states. The quotient of the group of atomic insulators by a subset of atomic insulators such as those localized at the interior of the unit cell gives us the symmetry-based indicator for detecting ingap corner, hinge, and surface states.
Cite
@article{arxiv.1907.13632,
title = {Variants of the symmetry-based indicator},
author = {Ken Shiozaki},
journal= {arXiv preprint arXiv:1907.13632},
year = {2019}
}