Coupled Phonon Modes and Infrared Band Shapes in Crystal SiF
- 1 January 1977
- journal article
- research article
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 43 (3-4) , 223-234
- https://doi.org/10.1080/00268947708084669
Abstract
The absorption intensities of combination bands in the infrared spectrum of crystal SiF4 have been measured. One-and two-phonon energies and densities of states have been calculated with a dipole-dipole interaction potential. The contribution to absorption intensities due to non linear electric moments have been calculated. It is shown that most of the two-phonon infrared absorption is due to phonon-phonon coupling.Keywords
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