Pinning and Depinning of the Bragg Glass in a Point Disordered Model Superconductor

Abstract

The three-dimensional frustrated anisotropic XY model with point disorder is studied with both Monte Carlo simulations and resistively-shunted-junction dynamics to model the dynamics of a type-II superconductor with quenched point pinning in a magnetic field and a weak applied current. Both the collective pinning and the depinning of the Bragg glass is examined. We find a critical current I_c that separates a creep region with unmeasurable low voltage from a region with a voltage V \sim I-I_c, and also identify the mechanism behind this behavior. It is further found to be possible to collapse the data obtained at a fixed disorder strength by plotting the voltage versus TI, where T is the temperature, though the reason for this behavior is unclear.

References in corpus (6)

• Equilibrium First-Order Melting and Second-Order Glass Transitions of the Vortex Matter in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$
• Nonequilibrium Phase Transitions of Vortex Matter in Three-Dimensional Layered Superconductors
• Vortex glass transition in a frustrated 3D XY model with disorder
• Critical currents at the Bragg glass to vortex glass transition
• Velocity-force characteristics of an interface driven through a periodic potential
• Vortex glass transitions in disordered three-dimensional XY models: Simulations for several different sets of parameters

Cited by in corpus (7)

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• High Field Performance of Nano-Diamond Doped MgB2 Superconductor
• Ordered magnetism in the intrinsically decorated $j{}_{\mathrm{eff}}$ = $\frac{1}{2}$ $\alpha$-CoV${}_3$O${}_8$
• Phase transition in site-diluted Josephson junction arrays: A numerical study
• Dynamics of vortex glass phase in strongly type II superconductors
• Dynamics of glass phases in the two-dimensional gauge glass model