Investigation of the Weak‐Field Charge Transport in Semiconducting V2−VI3 Compounds with Trigonal Symmetry II. Interpretation of the Weak‐Field Charge Transport in Sb2Te3 Single Crystals

It is succeeded for the first time to interpret the thermoelectric and galvanomagnetic effects, in terms of a nonparabolic six‐valley one‐valence band model and anisotropic mixed scattering on acoustical phonons and ionized impurities and also the magnitude of thermomagnetic effects and the Lorenz numbers for Sb2Te3 single crystals in dependence on temperature between 100 to 300 K using physical relevant microscopic transport data. By a numerical analysis the effective main axis masses mHii, the tilt angle of Fermi ellipsoid ϑ, the masses m ⟂ c, m ‖ c, the density of state effective mass md, the mobilities u ⟂ c, u ‖ c, and the carrier density ptot are calculated. Also the Fermi level EF, the relaxation time factor τac0, the mixture parameters BHi and theparameter of nonparabolicity β are given. The calculated values are ingood agreement with the corresponding data found by using optical effects at 80 K and 300 K.