Title: Non-local electrodynamics effect on surface superconductivity
Authors: Van Cauteren, tim ×
Indekeu, Joseph #
Issue Date: May-2011
Publisher: Editions de Physique
Series Title: Europhysics Letters vol:94 issue:4 pages:-
Article number: 46001
Abstract: Effects of non-local electrodynamics on surface superconductivity in type-I superconductors in zero magnetic field are predicted, employing the Ginzburg-Landau (GL) theory as the local approximation. A perturbation expansion in the ratio xi(0)/xi (T) is set up, where xi(0) is the Pippard (or BCS) coherence length and xi the temperature-dependent GL coherence length of superconductivity. For materials with surface enhancement of superconductivity, characterized by a negative GL surface extrapolation length b and by a surface critical temperature T-cs that exceeds the bulk T-c, an additional increase of T-cs is predicted. Calculations to first order in xi(0)/xi (T) show that about 13% of the recently measured difference T-cs - T-c approximate to 0.05 K in a surface-enhanced Sn film, is attributable to a non-local electrodynamics effect. Copyright (C) EPLA, 2011
ISSN: 0295-5075
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Theoretical Physics Section
× corresponding author
# (joint) last author

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