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A theoretical study of Raman scattering and infrared absorption spectra of Ga 1− x In x P mixed crystals
Author(s) -
Kleinert P.,
Jahne E.
Publication year - 1981
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.2221070117
Subject(s) - raman spectroscopy , phonon , raman scattering , infrared , spectral line , x ray raman scattering , absorption spectroscopy , infrared spectroscopy , chemistry , absorption (acoustics) , scattering , lattice (music) , impurity , molecular physics , atomic physics , materials science , analytical chemistry (journal) , condensed matter physics , physics , optics , organic chemistry , chromatography , astronomy , acoustics
Abstract Using a Green's function technique a lattice dynamical study is carried out on the local density of states and the phonon‐optical properties for low concentrations of In atoms in Ga 1− x In x P. The impurity‐induced Raman scattering and infrared absorption spectra are calculated for two cases: the nearest‐neighboui force constants A and B change equally or differently. One obtains reasonable correspondence of the calculated spectra to the recently observed features in the Raman spectra lying in the TA phonon region as well as to the already known structures in the Raman and infrared reflection spectra lying in the optical phonon region by assuming Δ A / A ≈ −0.6 and Δ B / B ≈ 0.