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Engineering Floquet topological phases using elliptically polarized light

Seshadri, R and Sen, D (2022) Engineering Floquet topological phases using elliptically polarized light. In: Physical Review B, 106 (24).

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Official URL: https://doi.org/10.1103/PhysRevB.106.245401


We study a two-dimensional topological system driven out of equilibrium by the application of elliptically polarized light. In particular, we analyze the Bernevig-Hughes-Zhang model when it is perturbed using an elliptically polarized light of frequency ω described in general by a vector potential A(t)=(A0xcos(ωt),A0ycos(ωt+φ0)). Even for a fixed value of φ0, we can change the topological character of the system by changing the x and y amplitudes of the drive. We therefore find a rich topological phase diagram as a function of A0x, A0y, and φ0. In each of these phases, the topological invariant given by the Chern number is consistent with the number of spin-polarized states present at the edges of a nanoribbon. © 2022 American Physical Society.

Item Type: Journal Article
Publication: Physical Review B
Publisher: American Physical Society
Additional Information: The copyright for this article belongs to American Physical Society.
Keywords: Light polarization, Elliptically polarized light; Floquet; Out of equilibrium; Systems-driven; Topological invariants; Topological phase; Topological systems; Two-dimensional; Vector potential; Zhang model, Topology
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 17 Jan 2023 04:17
Last Modified: 17 Jan 2023 04:17
URI: https://eprints.iisc.ac.in/id/eprint/79184

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