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Title: Depinning transition of the superconducting/normal interface in low-kappa twinning-plane superconductors: Interface potential and interface displacement
Authors: Backx, G ×
Indekeu, Joseph #
Issue Date: 1997
Publisher: ELSEVIER SCIENCE BV
Series Title: Physica. C, Superconductivity vol:274 issue:1-2 pages:55-65
Conference: date:KATHOLIEKE UNIV LEUVEN,VASTE STOF FYS & MAGNETISME LAB,B-3001 LOUVAIN,BELGIUM
Abstract: We study the phase transition in which a superconductor/normal interface depins from a twinning plane in a type-I superconductor. This transition is a variant of the recently discovered interface delocalization or ''wetting'' transition in similar materials. We calculate the phase diagram of the depinning transition as a function of the twinning-plane transparency for electrons, and the local enhancement of superconductivity. We focus on the limit of strongly type-I materials, kappa --> 0, in which analytic results can be obtained. We further compute the interface potential V(l) and use that to calculate the displacement profile l(y) of the transition zone between a pinned and a depinned superconducting/normal interface in the vicinity of a twinning plane. In principle, the interface displacement profile can be probed experimentally by measuring the location of the jump in the magnetic induction between the superconducting and normal phases.
ISSN: 0921-4534
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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