Abstract
Tunneling characteristicsdI/dV have been taken on both sides of “dirty”In - Bi/Zn superimposed films, the temperatureT being such thatIn - Bi was superconducting and Zn normal. Most of the attention has been devoted to the regionT∼T c where the experimental curves can be compared with a reasonably accurate microscopic theory. We find reasonable agreement for the voltage scale and, more important, for theamplitude of the effects in the superconducting phase.
Résumé
On étudie les caractéristiques tunnel obtenues sur les deux faces de sandwichsIn - Bi/Zn, ces deux matériaux étant sales, à des températures telles que seul l'In - Bi soit supraconducteur. En particulier, au voisinage de la température critique du sandwich on dispose d'une théorie microscopique qu'il est possible de comparer directement à l'expérience. L'accord est correct pour les échelles d'énergie et surtout pourl'amplitude des effets dans la phase supraconductrice. Cela permet d'évaluer le potentiel de paires aux surfaces libres limites.
Zusammenfassung
Tunnel-Charakteristiken wurden beidseits von “unreinen” DoppelschichtenIn - Bi/Zn beobachtet (im Temperaturbereich von supraleitendemIn - Bi und normalleitendem Zn). Ein Vergleich mit einer mikroskopischen Theorie ist möglich in der Umgebung der kritischen Temperatur der Doppelschicht. Experiment und Theorie stimmen gut überein, sowohl bezüglich der Größe der Spannungen als auch vor allem derAmplitude der Effekte in der supraleitenden Phase. Dieser Umstand erlaubt eine Bestimmung des Paar-Potentials an den Grenzflächen.
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This work has been supported in part by the D.G.R.S.T. and Ecole de Physique et Chimie (Paris).
This paper, together with ref. [12] and [14] constitute basic references for a thesis [ref. 23].
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Guyon, E., Martinet, A., Mauro, S. et al. Superimposed normal and superconducting films. Phys kondens Materie 5, 123–140 (1966). https://doi.org/10.1007/BF02422732
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DOI: https://doi.org/10.1007/BF02422732