Electron transport in chevrel phase superconductors, Cu_1·8Mo₆S_8-ySe_y, 0 ≤ y ≤ 8 and Cu_1·8Mo₆S_8-yTe_y, 0 ≤ y ≤ 4— fit to Cote-Meisel theory

Abstract

Normal state electrical resistivity of the Chevrel phase compounds of the type Cu_1·8Mo₆S_8-ySe_y, 0 ≤ y ≤ 8 and Cu_1·8Mo₆S_8-yTe_y, 0 ≤ y ≤ 4 is analysed on the basis of the generalized diffraction model which incorporates a postulate on electron-phonon interaction, viz phonons with wavelength exceeding the electron mean-free path are ineffective electron scatterers. Fit obtained by this model was found to be superior to other models based on the interband s-d scattering of electrons.