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The Γ‐Point Band Structure Parameters of Cd x Hg 1− x Se ( x ≦ 0.1) Mixed Crystals from Thermomagnetic Measurements
Author(s) -
Iwanowski R. J.
Publication year - 1982
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221100211
Subject(s) - thermomagnetic convection , scattering , seebeck coefficient , condensed matter physics , effective mass (spring–mass system) , electronic band structure , fermi level , chemistry , electron , thermoelectric effect , materials science , magnetic field , physics , thermodynamics , quantum mechanics
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.