A minimal size for granular superconductors

L.M. Abreu, A.P.C. Malbouisson and I. Roditi

Physica A: Statistical Mechanics and its Applications, 2004, vol. 331, issue 1, 99-108

Abstract: We investigate the minimal size of small superconducting grains by means of a Ginzburg–Landau model confined to a sphere of radius R. This model is supposed to describe a material in the form of a ball, whose transition temperature when presented in bulk form, T0, is known. We obtain an equation for the critical temperature as a function of R and of T0, allowing us to obtain a minimal radius of the sphere below which no superconducting transition exists. An estimate of values of minimal radii for different materials is done.

Keywords: Superconductors; Superconductivity; Ginzburg–Landau; Grains and confinement (search for similar items in EconPapers)
Date: 2004
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:331:y:2004:i:1:p:99-108

DOI: 10.1016/j.physa.2003.09.032

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