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Temperature Dependence of the Oxygen Absorption Band in ZnTe: O
Author(s) -
Slusarenko V.,
Burki Y.,
Czaja W.,
Berger H.
Publication year - 1990
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.2221610245
Subject(s) - absorption (acoustics) , phonon , impurity , absorption spectroscopy , atomic physics , chemistry , symmetry (geometry) , coupling (piping) , absorption band , spectral line , molecular physics , materials science , condensed matter physics , optics , physics , geometry , mathematics , organic chemistry , metallurgy , astronomy
Absorption measurements are made as function of temperature for the isoelectronic trap ZnTe: O. This spectrum is well separated from the intrinsic absorption and from the absorption due to other impurities. The spectra can be semiquantitatively understood using a model developed for AgBr:I. The temperature dependence of the absorption due to LO‐phonon cooperation is given by ∼e −γT2 where γ can be derived from the value for AgBr:I. The fine structure of the absorption is explained and the spectral symmetry between emission and absorption is discussed in detail. The electron—phonon coupling (Huang‐Rhys factor) is found to be different for different phonon modes and smaller in absorption than in emission for optical modes but the inverse is true for accoustic modes.