Work

Cavity quantum electrodynamical Chern insulator: Towards light-induced quantized anomalous Hall effect in graphene

Year: 2019

Type: article

Abstract: We show that an energy gap is induced in graphene by light-matter coupling to a circularly polarized photon mode in a cavity. Using many-body perturbation theory, we compute the electronic spectra which exhibit photon-dressed sidebands akin to Floquet sidebands for laser-driven materials. In contrast with Floquet topological insulators, in which a strictly quantized Hall response is induced by light only for off-resonant driving in the high-frequency limit, the photon-dressed Dirac fermions in the cavity show a quantized Hall response characterized by an integer Chern number. Specifically for graphene, we predict that a Hall conductance of $2{e}^{2}/h$ can be induced in the low-temperature limit.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.99.235156

Authors: Xiao Wang, Enrico Ronca, Michael A. Sentef

Institutions: Tsinghua University, Max Planck Institute for the Structure and Dynamics of Matter

Language: English

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funder: Deutsche Forschungsgemeinschaft

Award: G5586663373