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Conduction Band Structure of Cd 0.1 Hg 0.9 Te
Author(s) -
Galazka R. R.,
Sosnowski L.
Publication year - 1967
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.19670200109
Subject(s) - seebeck coefficient , effective mass (spring–mass system) , scattering , hall effect , condensed matter physics , atmospheric temperature range , thermal conduction , electron , impurity , doping , analytical chemistry (journal) , chemistry , electrical resistivity and conductivity , materials science , thermoelectric effect , physics , thermodynamics , optics , organic chemistry , quantum mechanics , composite material , chromatography
The Hall coefficient R H and the conductivity σ are measured in the temperature range 4.2 to 300 °K. The thermoelectric power α as a function of the magnetic field and temperature are measured in the range 100 to 300 °K. The value of the effective mass m ast; is calculated from these measurements for electron concentrations from 6.25 × 10 16 to 2.71 × 10 18 cm −3 . The dependence of the effective mass m ast; on k is interpreted according to Kane's model of the conduction band structure. The best agreement is obtained for values of the parameters ε 0 = εΓ 6 – εΓ 8 = −0.00 eV and the coupling constant Q = 12 eV, that is for a linear ε vs. k dependence. The mobility of the electrons as a function of concentration and temperature is also analyzed. For temperatures below 77 °K impurity scattering is dominant. Within the temperature range 77 to 300 °K the best agreement between theory and experiment is obtained for mixed ionic and optical phonon scattering.