Publicação: Crossover from type I to type II regime of mesoscopic superconductors of the first group
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In the present work, we have studied the crossover between type I and type II superconductivity on mesoscopic superconducting thin films by numerically solving the 3D Ginzburg-Landau equations. We determined the dependence on temperature of the critical Ginzburg-Landau parameter kc(d), below which the superconductor behaves as type I for a given thickness d of the film. The effect of the sample dimensions on this crossover was also investigated. Additionally, we report a novel giant vortex configuration with a local minimum of the magnetic field at the centre of the core. Finally, we present certain results suggesting that the vortex-vortex interaction is not monotonic, varying instead from long-range attraction to short-range repulsion
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Superconductivity, Vortex matter, Time-dependent Ginzburg-Landau equations, Type-I superconductivity
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Inglês
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Leonardo Rodrigues Cadorim et al 2020 J. Phys.: Condens. Matter 32 095304
