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Ultrathin superconducting films of amorphous Mo-Ge were made that remain homogeneous down to {~}20 {}. The expected localization behavior was observed in their resistivity-versus-temperature and sheet resistance (R_) data. A systematic reduction of the transition temperature with increasing R_ was observed for several compositions, consistent with recent theories of localization and Coulomb interaction effects on superconductivity. Critical-field data provide further tests of these theories.
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Graybeal et al. (1984) studied this question.
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