Scattering theory of interface resistance in magnetic multilayers
  The scattering theory of transport has to be applied with care in a diffuse environment. Here we discuss how the scattering matrices of heterointerfaces can be used to compute interface resistances of dirty magnetic multilayers. First principles calculations of these interface resistances agree well with experiments in the CPP (current perpendicular to the interface plane) configuration. 
Gerrit E.W. Bauer, Kees M. Schep, Ke Xia, and Paul J. Kelly