THE COMPARATIVE-ANALYSIS OF SOME LOW-FREQUENCY VIBRATIONAL-STATE DENSITY MODELS OF THE AMORPHOUS MATERIALS - APPLIED TO THE AS2S3 GLASS

The specific heat from 3K to 15K and the Raman spectra were measured o n the As2S3 glass. The specific heat data were fitted using two differ ent models of the vibrational state density, i.e. the phonon-fraction model and the model of lognormal distribution of frequencies. We have shown that the excess vibrational state density which governs the spec ific heat behaviour gives only a little contribution to the intensity of Raman scattering in the boson peak region.