| Issue |
EPL
Volume 94, Number 4, May 2011
|
|
|---|---|---|
| Article Number | 46001 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
| DOI | https://doi.org/10.1209/0295-5075/94/46001 | |
| Published online | 04 May 2011 | |
Non-local electrodynamics effect on surface superconductivity
Instituut voor Theoretische Fysica, Katholieke Universiteit Leuven - Celestijnenlaan 200 D, BE-3001 Leuven, Belgium, EU
a
joseph.indekeu@fys.kuleuven.be
Received:
31
December
2010
Accepted:
5
April
2011
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 ξ0/ξ(T) is set up, where ξ0 is the Pippard (or BCS) coherence length and ξ 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 Tcs that exceeds the bulk Tc, an additional increase of Tcs is predicted. Calculations to first order in ξ0/ξ(T) show that about 13% of the recently measured difference Tcs−Tc≈0.05 K in a surface-enhanced Sn film, is attributable to a non-local electrodynamics effect.
PACS: 68.35.Rh – Phase transitions and critical phenomena / 74.25.Bt – Thermodynamic properties / 64.60.F- – Equilibrium properties near critical points, critical exponents
© EPLA, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.