Calculations of the electron–ion coupling factor using the Starrett and Saumon average-atom model

Several methods are examined to calculate the electron–ion coupling factor based on the two-temperature Starrett and Saumon average-atom model with ion correlations. It is found that the approach utilizing transport scattering cross section calculated in the pseudoatom potential with no ionic structure factor included provides both a correct description of high-temperature asymptotics and satisfactory agreement with the multicenter modeling data for a number of metals at temperatures of the order of a few electron volt.