Parallel nucleation field in thin superconducting films
V. G. Kogan
DOI 10.1103/PhysRevB.34.3499 · Physical Review B
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Abstract
Nucleation of superconductivity in a thin film situated in a parallel magnetic field is considered. The field dependence of the coherence length is taken into account. In particular, the known result for the nucleation field H near the critical temperature Tc is shown to hold only in the dirty limit. For a finite mean free path H2 depends linearly on T as in the dirty limit. However, the slope dH2dT at Tc may change sign to positive for thin and clean enough films.
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