Comparative study of the inelastic diffusion lengths in weakly localising Pd and PdHxfilms

Abstract

The authors determine the inelastic diffusion lengths of weakly localising Pd and PdH_x films from measurements of the anomalous magnetoresistance. They observe that these lengths are much shorter in Pd than in PdH_x. This effect cannot be solely accounted for by a variation of the elastic diffusion constant but it implies modifications of the electronic structure. They propose that the electron-electron interactions are enhanced in Pd compared with PdH_x through either s-d scattering events or through scattering on magnetic fluctuations. For the electron-phonon part the authors suggest that the coupling parameter with acoustic phonons is greater in Pd, although superconductivity PdH_x and not in Pd.