The intermediate type-I superconductors in the mesoscopic scale

Abstract

M. Tinkham and P. G. de Gennes, described in their books the existence of an intermediate type-I superconductor as a consequence of an external surface that affects the well known classification of superconductors into type-I and II. Here we consider the mesoscopic superconductor where the ratio volume to area is small and the effects of the external surface are enhanced. By means of the standard Ginzburg-Landau theory the Tinkham-de Gennes scenario is extended to the mesoscopic type-I superconductor. We find new features of the transition at the passage from the genuine to the intermediate type-I. The latter has two distinct transitions, namely, from a paramagnetic to diamagnetic response in descending field and a quasi type-II behavior as the critical coupling is approached in ascending field. The intermediate type-I phase proposed here, and its corresponding transitions, reflect intrinsic features of the superconductor and not its geometrical properties.

Accepted for publication in Physical Review B. 6 pages, 4 figures

References in corpus (12)

• Extended Ginzburg-Landau formalism for two-band superconductors
• Superconductivity in the elements, alloys and simple compounds
• Theory of superconductor with kappa close to 1/sqrt{2}
• Type I Superconductivity in YbSb2 Single Crystals
• Paramagnetic Meissner effect in superconductors from self-consistent solutions of Ginzburg-Landau equations
• Confinement effects on intermediate state flux patterns in mesoscopic type-I superconductors
• Superconductivity in heavily boron-doped silicon carbide
• The BCS-BEC crossover induced by a shallow band: Pushing standard superconductivity types apart
• Onset of surface superconductivity beyond the Saint-James-de Gennes limit
• Spontaneous Pattern Formation in Intertype Superconducting Films
• Nucleation of Superconductivity in Thin Type-I Foils
• Vortex pattern in a nanoscopic cylinder