Relaxation dynamics in type-II superconductors with point-like and correlated disorder

  • Ulrich Dobramysl
  • Hiba Assi
  • Michel Pleimling
  • Uwe C. Täuber
Regular Article

Abstract

We employ an elastic line model to investigate the steady-state properties and non-equilibrium relaxation kinetics of magnetic vortex lines in disordered type-II superconductors using Langevin molecular dynamics (LMD). We extract the dependence of the mean vortex line velocity and gyration radius as well as the mean-square displacement in the steady state on the driving current, and measure the vortex density and height autocorrelations in the aging regime. We study samples with either randomly distributed point-like or columnar attractive pinning centers, which allows us to distinguish the complex relaxation features of interacting flux lines subject to extended vs. uncorrelated disorder. Additionally, we find that our new LMD findings match earlier Monte Carlo (MC) simulation data well, verifying that these two microscopically quite distinct simulation methods lead to macroscopically very similar results for non-equilibrium vortex matter.

Keywords

Solid State and Materials 

Supplementary material

10051_2013_976_MOESM1_ESM.mp4 (2.6 mb)
Supplementary material, approximately 2.58 MB.

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Ulrich Dobramysl
    • 1
  • Hiba Assi
    • 1
  • Michel Pleimling
    • 1
  • Uwe C. Täuber
    • 1
  1. 1.Department of PhysicsBlacksburgUSA

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