The properties of the band spectrum parameters in the band‐inversion region of narrow‐gap Ph 1− x Sn x Te

A calculation technique based on experimental data is proposed for determining the Dimmock model parameters m   ⊥ ±, ‖  1 ± , P ⊥ ,‖ of narrow‐gap Pb i− x Sn x Te alloys. From the six‐band model, a relation is derived to describe the dependence of the current carrier g ‐factor on carrier concentration of the alloy composition. The composition dependence of the matrix element of the momentum operator (MOME) P ⊥ as derived earlier by the authors is studied over a wide range of compositions x . The analysis of experimental data reveals an anomalous behaviour of P ⊥ in the region of band inversion. The dependence P ⊥( x ) may be approximated by an exponential function. The dependences of effective masses, the g ‐factor of electrons and holes, as well as mass anisotropy coefficients, on composition and carrier concentration are analyzed on the assumption that P is a function of composition. The results of the analysis are compared with experiment. It is shown that the disagreement between theory and experiment can be substantially reduced by substituting P ⊥ ( x ) for P ⊥ = const. Relations are given by which the carrier parameters in Pb 1− x Sn x Te can be calculated in terms of the Dimmock model.