Flux Confinement in Mesoscopic Superconductors

Details Flux Confinement in Mesoscopic Superconductors Flux Confinement in Mesoscopic Superconductors

1998-11-13

arxiv.org/abs/cond-mat/9811183v1

Physics

Condensed Matter

Superconductivity

10 pages, 5 EPS figures, uses LaTeX's sup.sty, contribution to a special issue of "Superlattices and Microstructures"

Scientific paper

10.1006/spmi.1999.0714

We report on flux confinement effects in superconducting submicron line, loop and dot structures. The main idea of our study was to vary the boundary conditions for confinement of the superconducting condensate by taking samples of different topology and, through that, modifying the lowest Landau level E_{LLL}(H). Since the critical temperature versus applied magnetic field T_{c}(H) is, in fact, E_{LLL}(H) measured in temperature units, it is varied as well when the sample topology is changed. We demonstrate that in all studied submicron structures the shape of the T_{c}(H) phase boundary is determined by the confinement topology in a unique way.

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