Cavity quantum-electrodynamical polaritonically enhanced electron-phonon coupling and its influence on superconductivity.

ABSTRACT: So far, laser control of solids has been mainly discussed in the context of strong classical nonlinear light-matter coupling in a pump-probe framework. Here, we propose a quantum-electrodynamical setting to address the coupling of a low-dimensional quantum material to quantized electromagnetic fields in quantum cavities. Using a protoypical model system describing FeSe/SrTiO₃ with electron-phonon long-range forward scattering, we study how the formation of phonon polaritons at the two-dimensional interface of the material modifies effective couplings and superconducting properties in a Migdal-Eliashberg simulation. We find that through highly polarizable dipolar phonons, large cavity-enhanced electron-phonon couplings are possible, but superconductivity is not enhanced for the f

SUBMITTER: Sentef MA 

PROVIDER: S-EPMC6269157 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature