Transport properties in a superconducting proximity sandwich. Kondo effect

Abstract

Temperature-dependent properties are evaluated in a superconductingKondo alloy induced by the proximity effect. These include (i) the order parameter, (ii) the dc Yosephson current, and (iii) the thermal conductivity and ultrasonic attenuation, in the case when there is reentrance of superconductivity. The calculations are based on the theory given by Kaiser, in which the McMillan tunneling model and the Miiller-Hartmann-Zittartz theory are combined. The temperature dependence of pair-breaking is reflected directly in the above properties in much the same way as in an intrinsic Kondo superconductor, ind&ating that proximity-effect studies may provide detailed information on the Kondo effect in superconductivity.