Floquet higher order topological insulator in a periodically driven bipartite lattice
Abstract
Floquet higher order topological insulators (FHOTIs) are a novel topological phase that can occur in periodically driven lattices. An appropriate experimental platform to realize FHOTIs has not yet been identified. We introduce a periodically-driven bipartite (two-band) system that hosts FHOTI phases, and predict that this lattice can be realized in experimentally-realistic optical waveguide arrays, similar to those previously used to study anomalous Floquet insulators. The model exhibits interesting phase transitions from first-order to second-order topological matter by tuning a coupling strength parameter, without breaking lattice symmetry. In the FHOTI phase, the lattice hosts corner modes at eigenphase or , which are robust against disorder in the individual couplings.
Keywords
Cite
@article{arxiv.2010.03879,
title = {Floquet higher order topological insulator in a periodically driven bipartite lattice},
author = {Weiwei Zhu and Y. D. Chong and Jiangbin Gong},
journal= {arXiv preprint arXiv:2010.03879},
year = {2021}
}
Comments
5+ pages for the main text, plus 7 pages for the Supplementary Materials, to be submitted to Phys. Rev. B