Abstract
Quenched condensed films of Sn, Tl, In and Hg are fine crystalline and have very short mean free path. The upper critical field of these disordered superconductors is measured. The initial slope,dB c 2/dT is compared with a strong coupling calculation. We use α2 F(ω) which is measured for these superconductors in the pure state and for Sn in the quenched state. The strong coupling behavior enhances the upper critical field by 15–20%. We find a fair (about 10%) agreement between the experimental and theoretical values ofdB c 2/dT except for Hg. In Hg one has either to consider band structure effects or the α2 F(ω) of quenched condensed Hg is quite different from that of pure Hg.
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Bergmann, G. The upper critical field of quenched condensed Sn, Tl, In and Hg with extremely short mean free path. Z. Physik 267, 287–293 (1974). https://doi.org/10.1007/BF01669450
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DOI: https://doi.org/10.1007/BF01669450