Electron—Phonon Interaction in Transition Metals. Results of Relativistic APW Band Structure Calculations

The Hopfield parameter η of the electron—phonon coupling is calculated for twelve transition metals (Rh, Pd, Ag, Lu, Hf, Ta, W, Re, Os, Ir, Pt, Au) in the rigid muffin‐tin approximation. Using relativistic APW band structure data and a generalized Gaspari‐Gyorffy formula the influence of relativistic effects is completely taken into account. It is found that η may be calculated in remarkably good approximation using spin‐weighted averages of phase shifts and density matrix coefficients. The theoretical results for the electron—phonon parameter λ and the electronic specific heat are compared with the experimental data.