The tunneling conductance is calculated by the use of a theory extending the Kaiser-Zuckermann theory. The superconducting proximity effect in a superconductor-normal metal sandwich system in which the metal on the normal side contains dilute 3d transition metal impurities is taken into account fully. An analysis for experimental results of the tunneling conductance on CuCr backed by Pb is presented. Qualitative agreement between the present calculations and the experimental data is obtained.
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Machida, K., Dumoulin, L. Proximity effect for superconductors containing transition metal impurities. II. J Low Temp Phys 31, 143–152 (1978). https://doi.org/10.1007/BF00116234
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DOI: https://doi.org/10.1007/BF00116234