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Title: Masking effect of heat dissipation on the current-voltage characteristics of a mesoscopic superconducting sample with leads
Authors: Vodolazov, DY ×
Peeters, FM
Morelle, Mathieu
Moshchalkov, Victor #
Issue Date: May-2005
Publisher: Published by the American Physical Society through the American Institute of Physics
Series Title: Physical Review B, Condensed Matter and Materials Physics vol:71 issue:18
Conference: date:Univ Antwerp, Dept Fys, B-2610 Antwerp, Belgium; Russian Acad Sci, Inst Phys Microstruct, Nizhnii Novgorod 603950, Russia; Katholieke Univ Leuven, Lab Solid State Phys & Magnetism, Nanoscale Superconduct & Magnetism Grp, B-3001 Louvain, Belgium
Abstract: A theoretical analysis based on a numerical solution of the coupled time-dependent Ginzburg-Landau and heat dissipation equations shows a strong dependence of the critical currents on the applied magnetic field in a mesoscopic square with attached contacts. In agreement with experiment we found hysteresis which are caused by a strong heat dissipation in the sample at currents closed to the depairing Ginzburg-Landau current and/or the dynamics of the superconducting condensate. The the oretically obtained nonmonotonous dependence of the switching current (from superconducting to the resistive state) on the applied magnetic field, a-rising from the changes in the vorticity, agrees quantitatively with the experimental data. Our results show that heat dissipation leads to an increase of the hysteresis in the current-voltage characteristic and hence masks the actual dynamics of the superconducting condensate.
ISSN: 1098-0121
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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