The Γ‐Point Band Structure Parameters of Cd x Hg 1− x Se ( x ≦ 0.1) Mixed Crystals from Thermomagnetic Measurements

Measurements of thermoelectric power as a function of magnetic field, α( H ), at 30 and 100 K in undoped n‐Cd x Hg 1− x Se ( x = 0.05; 0.10) mixed crystals are performed. Electron effective mass at the Fermi level vs. carrier concentration is determined. The fitting of theory to the experimental m   F * ( n ) dependences leads to the verification of certain band structure parameters. In particular, a modified E 0 , ( x, T ) dependence for Cd x Hg 1− x Se in the range T ≦ 100 K is proposed. Additional argument for the modified E 0 ( x, T ) dependence is given on the basis of the longitudinal Nernst‐Ettingshausen effect (Δα∞) measurements at 30 K. The theory, which includes the most important scattering mechanisms, gives much better agreement with the experiment when applying the new values of disorder scattering parameters V and W in calculations.