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Investigation of the Weak‐Field Charge Transport in Semiconducting V 2 −VI 3 Compounds with Trigonal Symmetry II. Interpretation of the Weak‐Field Charge Transport in Sb 2 Te 3 Single Crystals
Author(s) -
Stordeur M.,
Simon G.
Publication year - 1984
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.2221240240
Subject(s) - condensed matter physics , anisotropy , valence (chemistry) , scattering , effective mass (spring–mass system) , physics , charge carrier , chemistry , optics , quantum mechanics
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 Sb 2 Te 3 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 m H ii , the tilt angle of Fermi ellipsoid ϑ, the masses m ⟂ c , m ‖ c , the density of state effective mass m d , the mobilities u ⟂ c , u ‖ c , and the carrier density p tot are calculated. Also the Fermi level E F , the relaxation time factor τ ac 0 , the mixture parameters B H i 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.