Vortex transport and voltage noise in disordered superconductors

Abstract

We study, by means of three-dimensional Monte Carlo simulations, the current-voltage (IV) characteristics and the voltage noise spectrum at low temperatures of driven magnetic flux lines interacting with randomly placed point or columnar defects, as well as with periodically arranged linear pinning centers. Near the depinning current J_c, the voltage noise spectrum S(w) universally follows a 1/w^a power law. For currents J > J_c, distinct peaks appear in S(w) which are considerably more pronounced for extended as compared to point defects, and reflect the spatial distribution of the correlated pinning centers.

8 pages, latex, Elsevier style file and figures included

References in corpus (1)

• Location-Sensitive Measurement of the Local Fluctuation of Driven Vortex Density in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_y$

Cited by in corpus (11)

• Relaxation and Glassy Dynamics in Disordered Type-II Superconductors
• Relaxation dynamics in type-II superconductors with point-like and correlated disorder
• Vortex Washboard Voltage Noise in Type-II Superconductors
• Relaxation dynamics of vortex lines in disordered type-II superconductors following magnetic field and temperature quenches
• Resistive transition in granular disordered high-T${}_c$ superconductors: a numerical study
• Disordered vortex matter out of equilibrium: a Langevin molecular dynamics study
• Characterization of relaxation processes in interacting vortex matter through a time-dependent correlation length
• Flux line relaxation kinetics following current quenches in disordered type-II superconductors
• Nonequilibrium steady states of driven magnetic flux lines in disordered type-II superconductors
• Dynamical regimes of vortex flow in type-II superconductors with parallel twin boundaries
• Critical Scaling and Aging near the Flux Line Depinning Transition