Experimental Evidence for Giant Vortex States in a Mesoscopic Superconducting Disk

Details Experimental Evidence for Giant Vortex States in a Mesoscopic Superconducting Disk Experimental Evidence for Giant Vortex States in a Mesoscopic Superconducting Disk

2004-11-08

arxiv.org/abs/cond-mat/0411182v1

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures, accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.93.257002

Response of a mesoscopic superconducting disk to perpendicular magnetic fields is studied by using the multiple-small-tunnel-junction method, in which transport properties of several small tunnel junctions attached to the disk are measured simultaneously. This allows us for the first experimental distinction between the giant vortex states and multivortex states. Moreover, we experimentally find magnetic field induced rearrangement and combination of vortices. The experimental results are well reproduced in numerical results based on the nonlinear Ginzburg-Landau theory.

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