Vortex charge in mesoscopic superconductors

Details Vortex charge in mesoscopic superconductors Vortex charge in mesoscopic superconductors

2000-11-17

arxiv.org/abs/cond-mat/0011301v1

Physics

Condensed Matter

Superconductivity

8 pages, 7 figures; submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.64.144511

The electric charge density in mesoscopic superconductors with circular symmetry, i.e. disks and cylinders, is studied within the phenomenological Ginzburg-Landau approach. We found that even in the Meissner state there is a charge redistribution in the sample which makes the sample edge become negatively charged. In the vortex state there is a competition between this Meissner charge and the vortex charge which may change the polarity of the charge at the sample edge with increasing magnetic field. It is shown analytically that in spite of the charge redistribution the mesoscopic sample as a whole remains electrically neutral.

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