Elsevier

Physica

Volume 55, October 1971, Pages 718-726
Physica

Tunneling investigation of the proximity effect in thick lead films backed by iron

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Abstract

A recent theory of the superconductor-normal-metal interface makes definite predictions of the amplitude (and its energy dependence) of the Tomasch oscillations observed in tunneling into a superconductor backed by a normal metal. We present measurements of this amplitude in Al-I-Pb/Fe junctions and illustrate, in particular, the mean free path dependence of the amplitude. In Pb films less than 1 μ thick we observe gaplessness produced by the Fe. The effect of Fe on the “phonon induced structure” in thin Pb films is also reported.

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Cited by (5)

  • Nonsuperconducting Electron Tunneling Spectroscopy

    1975, Solid State Physics - Advances in Research and Applications
  • Tomasch effect and superconducting proximity

    1976, Journal of Low Temperature Physics
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