Disorder effects in unconventional multiband superconductor junctions*

We study the transport properties of superconducting junctions consisting of unconventional multinand superconductors in the presence of nonmagnetic disorder. We employ the quasiclassical approximation to derive a set of Eilenberger equations for the quasiclassical Green's functions. By implementing the generalized boundary conditions for the quasiclassical functions, we solve the Eilenberger equations numerically and compute the tunneling conductance as well as the spatial dependence of superconducing pairing amplitude. The application of our results to the analysis of current experimental data will be discussed.