Floquet higher-order topological insulator in a periodically driven bipartite lattice
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 phase...
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sg-ntu-dr.10356-1510932023-02-28T19:55:35Z Floquet higher-order topological insulator in a periodically driven bipartite lattice Zhu, Weiwei Chong, Yidong Gong, Jiangbin School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies (CDPT) Science::Physics Exotic Phases of Matter Topological Effects in Photonic Systems 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. Ministry of Education (MOE) National Research Foundation (NRF) Published version We acknowledge funding support by the Singapore Ministry of Education Academic Research Fund Tier-3 (Grant No. MOE2017-T3-1-001 and WBS No. R-144-000-425-592) and by the Singapore NRF Grant No. NRF-NRFI2017-04 (WBS No. R-144-000-378- 281). We are grateful to L. Li, M. Umer, R. Bomantara, H. Xue, and B. Zhang for helpful discussions. 2021-06-28T09:58:27Z 2021-06-28T09:58:27Z 2021 Journal Article Zhu, W., Chong, Y. & Gong, J. (2021). Floquet higher-order topological insulator in a periodically driven bipartite lattice. Physical Review B, 103(4), L041402-. https://dx.doi.org/10.1103/PhysRevB.103.L041402 2469-9950 https://hdl.handle.net/10356/151093 10.1103/PhysRevB.103.L041402 2-s2.0-85099272714 4 103 L041402 en MOE2017-T3-1-001 R-144-000-425-592 NRF-NRFI2017-04 R-144-000-378- 281 Physical Review B © 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). application/pdf |
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Science::Physics Exotic Phases of Matter Topological Effects in Photonic Systems Zhu, Weiwei Chong, Yidong Gong, Jiangbin Floquet higher-order topological insulator in a periodically driven bipartite lattice |
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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. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Zhu, Weiwei Chong, Yidong Gong, Jiangbin |
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Article |
author |
Zhu, Weiwei Chong, Yidong Gong, Jiangbin |
author_sort |
Zhu, Weiwei |
title |
Floquet higher-order topological insulator in a periodically driven bipartite lattice |
title_short |
Floquet higher-order topological insulator in a periodically driven bipartite lattice |
title_full |
Floquet higher-order topological insulator in a periodically driven bipartite lattice |
title_fullStr |
Floquet higher-order topological insulator in a periodically driven bipartite lattice |
title_full_unstemmed |
Floquet higher-order topological insulator in a periodically driven bipartite lattice |
title_sort |
floquet higher-order topological insulator in a periodically driven bipartite lattice |
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2021 |
url |
https://hdl.handle.net/10356/151093 |
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1759853432974344192 |