Abstract
The measured temperature variation of the maximum zero-field dc Josephson current for small Nb-NbO x -Sn junctions falls slightly under the Ambegaokar-Baratoff theoretical curve for temperatures nearT c(Sn). This is consistent with measurements on Nb-NbO x -Pb junctions and may be due to proximity effects at the Nb surface.
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Work supported in part by the Gruppo Nazionale di Struttura della Materia.
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Parmentier, R.D., Costabile, G., Rissman, P. et al. Temperature dependence of the maximum Josephson current in Nb-NbO x -Sn junctions. J Low Temp Phys 22, 529–533 (1976). https://doi.org/10.1007/BF00659058
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DOI: https://doi.org/10.1007/BF00659058