Deviations from Matthiessen’s Rule on the Surface Scattering in Aluminum

抄録

The electrical resistivity of aluminum strips has been measured for various thickness (0.02–1.48 mm) and over a temperature (1.5–60 K). The results show the deviation from Matthiessen’s rule (DMR) Δ_s(T) on the surface scattering. The surface reflection parameter p is determined to be nearly zero from the temperature at which the maximum of Δ_s(T) appears. The DMR Δ_s(T) shows different profiles from DMR on the impurity scattering. The comparison of the present data with Husstad-Lothe theory shows that the effect of small angle electron-phonon scattering is small on the surface scattering. The present experiments can be explained by a term of the surface resistivity ρ_s(T) (=ρ_s(0)+Δ_s(T)) deduced from Fuchs-Sondheimer theory. It is thus concluded that DMR Δ_s(T) mainly arises from the spatial variation of the electron distribution function.