Title: Increasing the critical temperature of a superconductor by curving its surface
Authors: Montevecchi, E ×
Indekeu, Joseph #
Issue Date: 2000
Publisher: E D P SCIENCES
Series Title: Europhysics letters vol:51 issue:6 pages:661-666
Conference: date:Katholieke Univ Leuven, Lab Vaste Stoffys & Magnetisme, B-3001 Louvain, Belgium
Abstract: Using Ginzburg-Landau theory it is predicted that the critical temperature T-c of a mesoscopic superconductor with surface enhancement can be increased significantly with respect to the bulk T-c, by introducing surface curvature. While confinement and reduction of the dimensionality lead to a critical-point shift T-c(L) - T-c(infinity) which decays exponentially with the ratio L/xi of sample size to coherence length, surface curvature gives rise to a more important algebraic shift T-c(R) - T-c(infinity) proportional to the curvature xi/R. As an example, order-of-magnitude estimates for the increase of T-c are given for cold-worked mesoscopic InBi cylindrical wires and spherical grains.
ISSN: 0295-5075
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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