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INFRARED REFLECTIVITY SPECTRA OF TLGAS2-TYPE LAYER CRYSTALS

1982-01-01
Hasanlı, Nızamı
DZHAVADOV, BM
RAGIMOV, AS
TAGIROV, VI
GUSEINOV, RE
Infrared reflectivity spectra of TIGaS2, TIGaSe2 and TlInS2 layer crystals are measured for the polarization directions perpendicular and parallel to the optical c-axis in the spectral range from 20 to 400 cm-1. The optical dispersion parameters are obtained for both polarization directions. Besides, normal coordinates and effective force constants are determined for high-frequency lattice vibrations.