Quadratic temperature dependence of magnetoresistivity of pure tungsten single crystals under static skin effect

Abstract

Transverse magnetoresistivity of tungsten single crystals with residual resistivity ratio of ρ293K/ρ4.2K ≈75 000 was measured in the temperature range of 2–75 K and in magnetic fields up to 80 kOe. At low temperatures in these “dimensional” crystals a quadratic temperature dependence of magnetoresistivity ρxx is found. It is shown that the observed quadratic dependence ρxx(T) emerges under static skin effect and is a manifestation of the interference scattering mechanism “electron – phonon – surface,” similar to what happens in pure metals without a magnetic field. A qualitative explanation of the observed dependence is proposed here.