PUMA
Istituto dei materiali per l'elettronica ed il magnetismo     
Zanatta M., Fontana A., Rossi F., Gilioli E. Effects of permanent densification on the vibrational density of states of vitreous silica. In: Journal of Non-Crystalline Solids, vol. 357 pp. 1892 - 1894. Elsevier B.V, 2011.
 
 
Abstract
(English)
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 ~ 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.
DOI: 10.1016/j.jnoncrysol.2010.11.110
Subject High Pressure densification
Vitreous silica
Boson peak
Permanent densification
Raman spectroscopy


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