PRESSURE EVOLUTION OF THE SUPERCONDUCTING-NORMAL METAL PHASE-BOUNDARYIN SUPERCONDUCTORS CONTAINING HIGH T-K KONDO IMPURITIES

The pressure evolution of the superconducting-normal phase boundary is studied in the framework of the Matsuura, Ichinose and Nagaoka (MIN) theory for the Kondo effect in superconductors. The Eliashberg approac h is used to obtain the normal and anomalous one-particle propagators of the host superconductor. It is found that in the high T-K limit (i. e., In(T-K/T-cO) > 1 limit), the slope of pressure induced change in t he T-c of a superconductor containing the impurities is greater than t he slope of the pressure induced change in the T-c of the host superco nductor, dT(cO)/d P and that it is possible to have a high T-K alloy, normal at zero pressure, go superconducting as the pressure is increas ed.