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Floquet engineering of multifold fermions

Jaiswal, R and Narayan, A (2020) Floquet engineering of multifold fermions. In: Physical Review B, 102 (24).

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Official URL: https://dx.doi.org/10.1103/PhysRevB.102.245416


Using Floquet theory, we investigate the effect of light on triplefold fermions. We study a low-energy model as well as a simplified tight-binding model under illumination. We find that the threefold degeneracy remains symmetry protected even after applying light if the original band structure is rotationally symmetric around the degeneracy. Otherwise, light can lift the degeneracy and open up a gap. We further investigate the effect of light on the topological Fermi arcs by means of numerical computations. The changes caused by illumination are reflected in experimentally detectable signatures, such as the anomalous Hall conductivity, which we calculate. © 2020 American Physical Society.

Item Type: Journal Article
Publication: Physical Review B
Publisher: American Physical Society
Additional Information: Copyright of this article belongs to American Physical Society
Keywords: Energy model; Fermi arcs; Floquet; Floquet theory; Hall conductivity; Numerical computations; Tight binding model
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
UG Programme
Date Deposited: 15 Jan 2021 10:24
Last Modified: 15 Jan 2021 10:24
URI: http://eprints.iisc.ac.in/id/eprint/67606

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