Phase-Shift Analysis of Impurity Scattering in Copper

An identity is proved that allows impurity scattering to be calculated in terms of partial waves by using conventional band-structure programs. It is particularly simple when used in conjunction with a phase-shift parametrization of the Fermi surface and it then conveniently gives the average scattering as sampled by the de Haas-van Alphen effect. The technique is illustrated by applying it to impurity scattering in copper.