Abstract
The primary features of the Raman and infrared spectra of tetrahedral glasses are associated with the edges of the vibrational bands calculated by Sen and Thorpe. The dominant Raman peak is assigned to a singular matrix element rather than a peak in the density of vibrational states. Simple expressions are developed which yield useful values of the vibrational force constants and intertetrahedral angles for vitreous Si, Ge, and Be.
- Received 11 September 1978
DOI:https://doi.org/10.1103/PhysRevB.19.4292
©1979 American Physical Society