Ginzburg-Landau theory of the upper critical field in layered local-pair superconductors
Z. Gedik
DOI 10.1103/PhysRevB.49.6372 · Physical Review B
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Abstract
The upper critical field for coupled layered superconductors with local pairs is analyzed within the mean-field approach for the anisotropic negative-U Hubbard model. Effects of reduced dimensionality are investigated by solving the Ginzburg-Landau equations to obtain critical fields for different anisotropy ratios. The Harper’s-type system of equations is solved analytically for some special field values. Limitations of Peierls substitution are also discussed.
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