High-frequency dynamical response of Abrikosov vortex lattice in flux-flow region

TL;DR

This paper analytically investigates the nonlinear dynamical response of the Abrikosov vortex lattice under oscillating fields, highlighting the role of phase transition proximity and comparing results with NbN experiments.

Contribution

It provides an analytical solution to the time-dependent Ginzburg-Landau equation for vortex lattice response, emphasizing nonlinear effects and practical control parameters.

Findings

Response is nonlinear and sensitive to phase transition proximity.

Good agreement with NbN experimental data in the linear regime.

Predictions on heating suppression and lattice configuration at high frequency.

Abstract

The dynamical response of the Abrikosov vortex lattice in the presence of an oscillating driving field is calculated by constructing an analytical solution of the time-dependent Ginzburg-Landau equation. The solution is steady-state, and work done by the input signal is dissipated through vortex cores, mainly by scattering with phonons. The response is nonlinear in the input signal, and is verified for consistency within the theory. The existence of well-defined parameters to control nonlinear effects is important for any practical application in electronics, and a normalised distance from the normal-superconducting phase-transition boundary is found to be such a parameter to which the response is sensitive. Favourable comparison with NbN experimental data in the optical region is made, where the effect is in the linear regime. Predictions are put forward regarding the suppression of heating and also the lattice configuration at high frequency.