Strong spin-orbit interaction and quadratic temperature dependence of electron-phonon scattering in disorder V75X25 (X = Pd, Al) alloys at low temperature

Abstract

The results of a comprehensive study of weak electron localization (WEL) and electron-electron interaction (EEI) effects in disordered V75X25 (X = Pd, Al) alloys has been reported. The resistivity in absence of magnetic field shows a minimum at temperature T = Tm and follows T1/2 law within the temperature range 5K ≤ T ≤ Tm, which suggests predominant EEI effect. Magnetoresistivity is positive due to strong spin-orbit interaction. The dephasing scattering time is dominated by the electron-phonon scattering. The electron-phonon scattering rate shows quadratic temperature dependence behavior, which is explained by the theory of incomplete dragging at the random scattering potential by phonons. The zero temperature scattering time strongly depends on the disorder and its magnitude decreases with increasing disorder.