Export citation

Export citation

Choose format for download:

Download Citation
  • Letter

Floquet higher-order topological insulator in a periodically driven bipartite lattice

Weiwei Zhu1, Y. D. Chong2,3,*, and Jiangbin Gong1,†

  • 1Department of Physics, National University of Singapore, Singapore 117542, Singapore
  • 2Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
  • 3Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637371, Singapore

  • *yidong@ntu.edu.sg
  • †phygj@nus.edu.sg

Phys. Rev. B 103, L041402 – Published 6 January, 2021

DOI: https://doi.org/10.1103/PhysRevB.103.L041402

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.

Physics Subject Headings (PhySH)

Authorization Required

We need you to provide your credentials before accessing this content.

Supplemental Material (Subscription Required)

References (Subscription Required)

Outline

Information

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation