Title: Superconductivity in a mesoscopic double square loop: Effect of imperfections
Authors: Fomin, VM ×
Devreese, JT
Bruyndoncx, V
Moshchalkov, Victor #
Issue Date: 2000
Series Title: Physical review. B, Condensed matter vol:62 issue:13 pages:9186-9190
Conference: date:Univ Instelling Antwerp, B-2610 Antwerp, Belgium; Katholieke Univ Leuven, Vaste Stof Fys & Magnetisme Lab, B-3001 Louvain, Belgium; Tech Univ Eindhoven, NL-5600 MB Eindhoven, Netherlands; State Univ Moldova, Dept Theoret Phys, MD-2009 Kishinev, Moldova; Univ Antwerp, RUCA, B-2020 Antwerp, Belgium
Abstract: We have generalized the network approach to include the effects of short-range imperfections in order to analyze recent experiments on mesoscopic superconducting double loops. The presence of weakly scattering imperfections causes gaps in the phase boundary B(T) or Phi(T) for certain intervals of T, which depend on the magnetic Bur penetrating each loop. This is accompanied by a critical temperature T-c(Phi), showing a smooth transition between symmetric and antisymmetric states. When the scattering strength of imperfections increases beyond a certain limit, gaps in the phase boundary T-c(B) or T-c(Phi) appear for values of magnetic flux lying in intervals around half-integer Phi(0) = hc/2e. The critical temperature corresponding to these values of magnetic flux is determined mainly by imperfections in the central branch. The calculated phase boundary is in good agreement with experiment.
ISSN: 0163-1829
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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