Inelastic Impurity Scattering of Electrons in Gold Alloys at Low Temperatures

摘要: The electrical resistivity of some binary gold alloys with copper and platinum was measured from 1.5° to 40°K, in order study deviations Matthiessen’s rule investigate a possible contribution phonon-assisted impurity scattering the resistance. This process originally suggested by Koshino,1 who ascribed it perturbing effect displacement potential lattice wave. criticized Taylor,2,3 showed that perturbation could be transformed away, leaving only small residual on resistivity. However, there is further arising strain site due wave, which should also lead scattering, an additional resistance form4 $$\Delta \rho = A{\rho _0}\left\langle {{\varepsilon ^2}} \right\rangle \beta \left( T \right){\rho _0}$$ (1) where ρ 0 resistivity, A numerical constant, 〈e 2〉 mean-square thermal strain, so β(T) ∝ 4 at low temperatures.