Flux creep in type-II superconductors: self-organized criticality approach

TL;DR

This paper models flux creep in type-II superconductors using a self-organized criticality framework, providing insights into magnetic flux penetration and current-voltage behavior in the flux creep regime.

Contribution

It introduces an extremal Robin Hood type model to simulate flux creep, connecting self-organized criticality with superconductor magnetic behavior.

Findings

The model reproduces critical state dynamics in superconductors.

Derived current-voltage characteristics in the flux creep region.

Provides a new theoretical approach to flux penetration phenomena.

Abstract

We consider the current density distribution function of a flux creep regime in type-II superconductors by mapping the flux creep process to the dynamics of a model with a self-organized criticality. We use an extremal Robin Hood type model which evolves to Been's type critical state to treat magnetic flux penetration into a superconductor and derive an analog of the current-voltage characteristics in the flux creep region.