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arXiv · 1308.3661

Giant vortex states in type I superconductors simulated by Ginzburg-Landau equations

Heikki Palonen·Juha Jäykkä·Petriina Paturi
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Abstract

The quantization of magnetic flux in superconductors is usually seen as vortices penetrating the sample. While vortices are unstable in bulk type I superconductors, restricting the superconductor causes a variety of vortex structures to appear. We present a systematic study of giant vortex states in type I superconductors obtained by numerically solving the Ginzburg-Landau equations. The size of the vortices is seen to increase with decreasing film thickness. In type I superconductors, giant vortices appear at intermediate thicknesses but they do not form a well-defined vortex lattice. In the thinnest type I films, singly quantized vortices seem to be stabilized by the geometry of the sample instead of an increase in the effective Ginzburg-Landau parameter.

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Heikki Palonen, Juha Jäykkä, Petriina Paturi. 2013-08-16. Giant vortex states in type I superconductors simulated by Ginzburg-Landau equations. https://doi.org/10.1088/0953-8984%2F25%2F38%2F385702

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