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Title: Floquet higher-order topological insulator in a periodically driven bipartite lattice
Authors: Zhu, Weiwei
Chong, Yidong
Gong, Jiangbin
Keywords: Science::Physics
Issue Date: 2021
Source: Zhu, W., Chong, Y. & Gong, J. (2021). Floquet higher-order topological insulator in a periodically driven bipartite lattice. Physical Review B, 103(4), L041402-.
Project: MOE2017-T3-1-001
R-144-000-378- 281
Journal: Physical Review B 
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 without static counterparts, 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 0 or π, which are robust against disorder in the individual couplings.
ISSN: 2469-9950
DOI: 10.1103/PhysRevB.103.L041402
Rights: © 2021 American Physical Society (APS). All rights reserved. This paper was published in Physical Review B and is made available with permission of American Physical Society (APS).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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