The Superconducting Proximity Effect as a Tool to Investigate Metal Films and Interfaces

Details The Superconducting Proximity Effect as a Tool to Investigate Metal Films and Interfaces The Superconducting Proximity Effect as a Tool to Investigate Metal Films and Interfaces

2004-04-13

arxiv.org/abs/cond-mat/0404298v1

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1140/epjb/e2004-00182-1

052

The superconducting proximity effect is measured in sandwiches of thin Pb films and the alkali metals Cs, Rb, K and Na. The $T_{c}$-dependence provides information about the interface barriers between Pb and the alkalis. Such a barrier is particularly large in Pb/Cs sandwiches. It is not due to impurities or oxydation. In the presence of a sufficiently strong barrier a special form of the Cooper limit can be applied to calculate the transition temperature of the sandwich.

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