Tunneling Effect in Superconductors with Magnetic Impurities

摘要

We investigate the influence of transition metal impurities on the amplitude of the Josephson tunneling current. We consider a junction made up of two identical superconductors containing transition metal impurities and define a parameter K which is the normalised difference of the derivative of Josephson currents for superconducting pairs with and without magnetic impurities. We find K=0 for U/ pi GAMMA<1 and K=0.129 for U/ pi GAMMA>>1 in the Abrikosov-Gorkov theory, as well as large deviations of K from this value for 1