Flux line relaxation kinetics following current quenches in disordered type-II superconductors
Abstract
We investigate the relaxation dynamics of magnetic vortex lines in type-II superconductors following rapid changes of the external driving current by means of an elastic line model simulated with Langevin molecular dynamics. A system of flux vortices in a sample with randomly distributed point-like defects is subjected to an external current of appropriate strength for a sufficient period of time so as to be in a moving non-equilibrium steady state. The current is then instantaneously lowered to a value that pertains to either the moving or pinned regime. The ensuing relaxation of the flux lines is studied via one-time observables such as their mean velocity and radius of gyration. We have in addition measured the two-time flux line height autocorrelation function to investigate dynamical scaling and aging behavior in the system, which in particular emerge after quenches into the glassy pinned state.
Keywords
Cite
@article{arxiv.1606.06100,
title = {Flux line relaxation kinetics following current quenches in disordered type-II superconductors},
author = {Harshwardhan Chaturvedi and Hiba Assi and Ulrich Dobramysl and Michel Pleimling and Uwe C. Täuber},
journal= {arXiv preprint arXiv:1606.06100},
year = {2016}
}
Comments
16 pages, 5 figures