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Flux line relaxation kinetics following current quenches in disordered type-II superconductors
- Publication Year :
- 2016
-
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.<br />16 pages, 5 figures
- Subjects :
- Statistics and Probability
Flux
FOS: Physical sciences
01 natural sciences
010305 fluids & plasmas
Superconductivity (cond-mat.supr-con)
numerical simulations
0103 physical sciences
010306 general physics
Condensed Matter - Statistical Mechanics
Physics
Superconductivity
vortex matter
Steady state
Condensed matter physics
Statistical Mechanics (cond-mat.stat-mech)
fluctuation
Condensed Matter - Superconductivity
aging
phenomena
Statistical and Nonlinear Physics
glassy dynamics
Vortex
slow relaxation
Radius of gyration
Relaxation (physics)
Statistics, Probability and Uncertainty
Current (fluid)
Type-II superconductor
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....0d2de5a5a132e54054d41c8d8e2b8b27