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The superconducting proximity effect as a tool to investigate metal films and interfaces

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Abstract.

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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Authors and Affiliations

  1. University of Southern California, CA 90089-0484, Los Angeles, USA

    D. Garrett, M. Zhang & G. Bergmann

Authors
  1. D. Garrett
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  2. M. Zhang
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  3. G. Bergmann
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Corresponding author

Correspondence to G. Bergmann.

Additional information

Received: 17 April 2004, Published online: 29 June 2004

PACS:

74.50. + r Tunneling phenomena; point contacts, weak links, Josephson effects - 73.20.-r Electron states at surfaces and interfaces - 71.20.Dg Alkali and alkaline earth metals

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Garrett, D., Zhang, M. & Bergmann, G. The superconducting proximity effect as a tool to investigate metal films and interfaces. Eur. Phys. J. B 39, 199–205 (2004). https://doi.org/10.1140/epjb/e2004-00182-1

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  • DOI: https://doi.org/10.1140/epjb/e2004-00182-1

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