Evaluation of density of vibrational states of glasses from low-frequency Raman spectra
- 1 September 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 48 (10) , 7692-7695
- https://doi.org/10.1103/physrevb.48.7692
Abstract
Low-frequency Raman spectra of some glasses have been measured at low temperature. Comparison of the spectra with heat-capacity data shows that in a broad frequency range the Raman intensity is simply proportional to the number of vibrational excitations [density of the vibrational states g(ν) multiplied by the Bose factor]. The conclusion is reached that g(ν) up to half of the Debye frequency may be evaluated from the low-frequency Raman spectra of disordered solids.Keywords
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