Electric charges in superconducting mesoscopic samplesElectric charges in superconducting mesoscopic samples
Faculty of Sciences. Physics
Condensed Matter Theory
Czechoslovak Journal of Physics
11th Czech and Slovak Conference on Magnetism (CSMAG 01), AUG 20-23, 2001, KOSICE, SLOVAKIA
52(2002):2, p. 303-306
University of Antwerp
The distribution of the electric charge density in mesoscopic superconducting disks and cylinders is studied within the phenomenological Ginzburg-Landau approach. We found that, even in the Meissner state the mesoscopic sample exhibits a non-uniform charge distribution such that a region near the sample edge becomes negatively charged. When vortices are inside the sample there is a superposition of the negative charge located at the vortex core and this Meissner charge, and, as a result, the charge at the sample edge changes sign as a function of the applied magnetic field.