EFFECT OF SINGLE-PARTICLE HOPPING AND OUT-OF-PLANE MAGNETIC IMPURITY ON COUPLED PLANAR SUPERCONDUCTORS

It is shown that the single particle band motion along the c axis is harmful for superconductivity in anisotropic systems. Variation of T-c with c axis hopping parameter is shown for both the conventional Josephson coupled, planar superconductors and for interlayer pair tunneling mechanism of Wheatley, Hsu, and Anderson (WHA). Effect of out-of-plane magnetic impurity substitution is shown to suppress T-c more for conventional superconductors whereas there is a very sharp decrease of T-c in the WHA mechanism at larger concentrations.