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Vibrational Spectra of U 1 ‐Centres in KI
Author(s) -
Bäuerle D.,
Fritz B.
Publication year - 1968
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.19680290213
Subject(s) - excited state , phonon , line (geometry) , spectral line , absorption (acoustics) , atomic physics , physics , infrared , symmetry (geometry) , absorption spectroscopy , optics , condensed matter physics , quantum mechanics , geometry , mathematics
U 1 ‐centres in KI have local mode absorption bands in the region of 700 cm −1 and an in‐gap absorption band at 86.7 cm −1 . The absence of any splitting in the main line (718cm −1 ) indicates centres of cubic symmetry ( T d ). The main line is accompanied by phonon sidebands. One of the strongest sidebands, 89 cm −1 above the main line, may be correlated with the directly excited phonon in the far infrared at 86.7 cm −1 .