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

MPG-Autoren
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Ronca,  E.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Sentef,  M. A.
Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

Externe Ressourcen

https://arxiv.org/abs/1903.00339
(Preprint)

https://dx.doi.org/10.1103/PhysRevB.99.235156
(Verlagsversion)

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PhysRevB.99.235156.pdf
(Verlagsversion), 3MB

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Zitation

Wang, X., Ronca, E., & Sentef, M. A. (2019). Cavity quantum electrodynamical Chern insulator: Towards light-induced quantized anomalous Hall effect in graphene. Physical Review B, 99(23): 235156. doi:10.1103/PhysRevB.99.235156.


Zitierlink: https://hdl.handle.net/21.11116/0000-0003-310C-9
Zusammenfassung
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 2e2/h can be induced in the low-temperature limit.