Temperature dependence of the surface upper critical field of superconducting alloys |
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Authors: | G Ebneth L Tewordt |
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Institution: | 1. Theoretische Abteilung, Institut für Angewandte Physik, Universit?t Hamburg, Germany
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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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