Work

Bandwidth-resonant Floquet states in honeycomb optical lattices

Year: 2016

Type: article

Abstract: We investigate, within Floquet theory, topological phases in the out-of-equilibrium system that consists of fermions in a circularly shaken honeycomb optical lattice. We concentrate on the intermediate regime, in which the shaking frequency is of the same order of magnitude as the band width, such that adjacent Floquet bands start to overlap, creating a hierarchy of band inversions. It is shown that two-phonon resonances provide a topological phase that can be described within the Bernevig–Hughes–Zhang model of HgTe quantum wells. This allows for an understanding of out-of-equilibrium topological phases in terms of simple band inversions, similar to equilibrium systems.

Source: New Journal of Physics

DOI: 10.1088/1367-2630/18/1/015006

Authors: A Quelle, M O Goerbig, C Morais Smith

Institutions: Utrecht University, Université Paris-Sud, Centre National de la Recherche Scientifique, Laboratoire de physique des Solides

Language: English

Topic: Topological Materials and Phenomena

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,610

Funder: Nederlandse Organisatie voor Wetenschappelijk Onderzoek