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Condensed Matter > Superconductivity
Title: Light-driven interlayer propagation of collective-mode excitations in layered superconductors
(Submitted on 13 Mar 2024 (v1), last revised 3 Apr 2024 (this version, v2))
Abstract: Superconductors exhibit a nonlinear interaction with an applied light, which can resonantly excite the collective amplitude (Higgs) mode. Here we study light-induced dynamics of layered superconductors, where each layer is coupled to adjacent layers via the Josephson coupling and the first few layers near the surface are driven by an in-plane-polarized light. We study the system under the assumption that the interlayer Coulomb interactions are sufficiently screened out and that the phase-difference mode becomes available in the low-energy regime. We find that interlayer transport is induced via excitations of the collective amplitude and phase-difference modes, even when the applied electric field is parallel to the planes. We provide analytic calculations as well as numerical simulations of the real-time dynamics, and investigate the influence on the light-induced interlayer Josephson current and intralayer third-harmonic generation.
Submission history
From: Niklas Yutaka Aeneas Ziereis [view email][v1] Wed, 13 Mar 2024 17:35:50 GMT (8528kb,D)
[v2] Wed, 3 Apr 2024 11:05:09 GMT (1068kb,D)
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