Nonequilibrium steady states of driven magnetic flux lines in disordered type-II superconductors

We investigate driven magnetic flux lines in layered type-II superconductors subject to various configurations of strong point or columnar pinning centers by means of a three-dimensional elastic line model and Metropolis Monte Carlo simulations. We characterize the resulting nonequilibrium steady st...

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Bibliographic Details
Published inarXiv.org
Main Authors Klongcheongsan, T, Bullard, T J, Tauber, U C
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 20.11.2009
Subjects
Computer simulation
Electric potential
Magnetic flux
Monte Carlo simulation
Physics - Superconductivity
Steady state
Structure factor
Superconductors
Three dimensional models
Transport phenomena
Transport properties
Variations
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Summary:We investigate driven magnetic flux lines in layered type-II superconductors subject to various configurations of strong point or columnar pinning centers by means of a three-dimensional elastic line model and Metropolis Monte Carlo simulations. We characterize the resulting nonequilibrium steady states by means of the force-velocity / current-voltage curve, static structure factor, mean vortex radius of gyration, number of double-kink and half-loop excitations, and velocity / voltage noise spectrum. We compare the results for the above observables for randomly distributed point and columnar defects, and demonstrate that the three-dimensional flux line structures and their fluctuations lead to a remarkable variety of complex phenomena in the steady-state transport properties of bulk superconductors.
ISSN:2331-8422
DOI:10.48550/arxiv.0911.4066