The comparative analysis of some low-frequency vibrational state density models of the amorphous materials — applied to the As 2S 3 glass

Abstract

The specific heat from 3K to 15K and the Raman spectra were measured on the As 2S 3 glass. The specific heat data were fitted using two different models of the vibrational state density, i.e. the phonon-fracton model and the model of lognormal distribution of frequencies. We have shown that the excess vibrational state density which governs the specific heat behaviour gives only a little contribution to the intensity of Raman scattering in the boson peak region.