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Structure of phonon sidebands of the ν 1 vibration absorption band of the NCO − impurity ion in KI:KCl and KBr:KCl mixed single crystals
Author(s) -
Kondilenko I. I.,
Tsyashchenko Yu. P.,
Zaporozhets V. M.,
Pinkevich I. P.
Publication year - 1975
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.2220720107
Subject(s) - impurity , phonon , sideband , ion , vibration , chemistry , lattice (music) , absorption (acoustics) , absorption band , band gap , lattice vibration , analytical chemistry (journal) , condensed matter physics , molecular physics , atomic physics , optics , physics , microwave , organic chemistry , chromatography , quantum mechanics , acoustics
The change of the structure due to local vibrations of the perturbed environment is studied at 10°K in the phonon sideband (PS) of the ν 1 vibration absorption band of the impurity ion NCO − in mixed KI:KCl and KBr:KCl lattices. It is found that at increased concentration of Cl − ions beginning from 1 wt% the intensity of a high‐frequency structure is sharply decreased and the number and half‐width of the gap‐local‐vibration bands increase; one fraction of these shifts to the high‐frequency side, the other to the long‐wave one. These effects are explained by the different locations of Cl − near NCO − in KI and KBr matrix lattices and, consequently, changes different in sign of the perturbed force constants of the axial interaction of the ν 1 stretching vibration with lattice phonons.