Electrodynamics of Nearly Ferroelectric Superconductors in the non-local Pippard limit

TL;DR

This paper investigates the magnetic field and current structures in nearly ferroelectric superconducting thin films, revealing unique patterns influenced by external radiation and ferroelectric resonance, with implications for vortex formation.

Contribution

It introduces a model of electrodynamics in NFE-SC films considering non-local Pippard effects, highlighting the impact of external radiation and ferroelectric resonance on current and magnetic field patterns.

Findings

External radiation induces alternating current strips.

Current strength depends on laser intensity and ferroelectric resonance.

Magnetic field patterns influence vortex formation.

Abstract

We report the structure of the magnetic field and secular current in a Nearly Ferroelectric Superconducting (NFE-SC) thin film. It was shown that unlike in conventional superconducting films, the external radiation causes alternating pattern of current strips. The strength of the innermost current torrents is governed by the laser field intensity as well as resonance with the ferroelectric component. The latter is modeled by secular reflection and random scattering in the Pippard non-local limit. Our calculations suggest that corresponding magnetic field pattern affects vortex formation in such material.