We present a detailed Raman scattering study of the boson peak evolution in vitreous silica as a function of density, from the normal one up to similar to 22% of densification. We show that the distribution of low frequency modes in the boson peak range does not change as a function of density, at least until the densification process starts to modify the glassy network structure from a fourfold coordinated structure into a sixfold coordinated one.
Effects of permanent densification on the vibrational density of states of vitreous silica
ZANATTA, Marco;
2011-01-01
Abstract
We present a detailed Raman scattering study of the boson peak evolution in vitreous silica as a function of density, from the normal one up to similar to 22% of densification. We show that the distribution of low frequency modes in the boson peak range does not change as a function of density, at least until the densification process starts to modify the glassy network structure from a fourfold coordinated structure into a sixfold coordinated one.
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