Disordered vortex matter out of equilibrium: a Langevin molecular dynamics study
Abstract
We discuss the use of Langevin molecular dynamics in the investigation of the non-equilibrium properties of disordered vortex matter. Our special focus is set on values of system parameters that are realistic for disordered high- superconductors such as YBCO. Using a discretized elastic line model, we study different aspects of vortices far from thermal equilibrium. On the one hand we investigate steady-state properties of driven magnetic flux lines in a disordered environment, namely the current-voltage characteristics, the gyration radius, and the pinning time statistics. On the other hand we study the complex relaxation processes and glassy-like dynamics that emerge in type-II superconductors due to the intricate competition between the long-range vortex-vortex repulsion and flux pinning due to randomly placed point defects. To this end we consider different types of sudden perturbations: temperature, magnetic field, and external current quenches.
Cite
@article{arxiv.1509.02227,
title = {Disordered vortex matter out of equilibrium: a Langevin molecular dynamics study},
author = {Hiba Assi and Harshwardhan Chaturvedi and Ulrich Dobramysl and Michel Pleimling and Uwe C. Tauber},
journal= {arXiv preprint arXiv:1509.02227},
year = {2016}
}
Comments
15 pages, 7 figures, to appear in Molecular Simulation for a special issue on "Nonequilibrium Systems"