Abstract
The temperature dependence of the surface upper critical field,H c3, nearT c is calculated for arbitrary values of the mean free pathl by taking into account the fourthorder term of the generalized Ginzburg-Landau theory. For finitel the boundary condition is modified such that the normal derivative of the energy gap at the surface becomes positive. The slope of the curveH c3/H c2 versust=T/T c att=1 is found to decrease monotoneously from zero to −1.040 as one goes from the “dirty” to the “clean” limit.
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The authors are indebted very much to Prof. K.Maki who suggested the present calculation.
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Ebneth, G., Tewordt, L. Temperature dependence of the surface upper critical field of superconducting alloys. Z. Physik 185, 421–425 (1965). https://doi.org/10.1007/BF01381710
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DOI: https://doi.org/10.1007/BF01381710