Buckled honeycomb group-$V$--$S_6$ symmetric $(d-2)$ higher order topological insulators
Materials Science
2020-09-09 v1 Mesoscale and Nanoscale Physics
Strongly Correlated Electrons
Abstract
Higher Order Topological Insulators (HOTI) are -spatial dimensional systems featuring topologically protected gap-less states at their -dimensional boundaries. With the help of \textit{ab-initio} calculations and tight binding models along with symmetry considerations we show that monolayer buckled honeycomb structures of group-V elements (Sb,As), which have already been synthesized, belong in this category and have a charge fractionalization of at the corner states as well as weak topological edge states, all protected by their properties under the inversion operation which classify this system as a quadrupole topological insulator.
Keywords
Cite
@article{arxiv.2003.12656,
title = {Buckled honeycomb group-$V$--$S_6$ symmetric $(d-2)$ higher order topological insulators},
author = {Santosh Kumar Radha and Walter R. L. Lambrecht},
journal= {arXiv preprint arXiv:2003.12656},
year = {2020}
}