Annotation

V.A.Kozlov, V.D.Lakhno, E.L.Nagaev.
Effects of two-stage drag of carriers by phonons on the electrical conductivity and maximum thermoelectric power of pure semimetals with a low density of carriers //Fiz. Tverd. Tela (Leningrad), 1983, v.25, №4, p.1124-1129

      The effects of a two-stage drag on the electrical conductivity and maximum thermoelectric power of pure semimetals with a low carrier density are studied. It is shown that the maximum in the temperature dependence of the drag thermoelectric power need not be related to scattering of phonons from the surface of a sample. This maximum occurs when the two-stage drag begins to manifest itself in the conductivity. The thermoelectric power due to the two-stage drag decreases with decreasing temperature following the T³ law, as in the case of the thermoelectric power of typical metals. The proposed theory can explain the observed absence of a plateau in the temperature dependence of the drag thermoelectric power of semimetals, which is predicted by the theory of a one-stage drag of the Herring type.