  It is generally observed that electrical transport properties of simple
liquid metal based alloys can be explained well in terms of Faber-Ziman theory,
2kF scattering model and finite mean free path approach. However, these
approaches give poor description for materials, which show departure from
nearly free electron (NFE) model. Taking Pb-Li as a test case of a system
showing departure from NFE (which also exhibit compound formation tendency and
disparate mass system), a new technique is proposed to compute electrical
transport properties using model potential formalism coupled with t-matrix
formulation. We have treated valence number of Pb & Li as a parameter in
determining phase shifts. Further, rather than calculating phase shift in terms
of Muffin-Tin potential, we have used model potential formalism. Present
results suggest that compared to other three theoretical approaches mentioned
above, present coupling scheme reproduce qualitative features of electrical
transport properties of liquid Pb-Li alloys, which can be used further to study
electrical transport properties of similar systems.
