Densification effects on the Boson peak in vitreous silica: a molecular-dynamics study

Abstract

We perform classical molecular-dynamics simulation to study the effect of densification on the vibrational spectrum of a model silica glass. We concentrate this study on the so-called Boson peak and compare our results, obtained from a direct diagonalization of the dynamical matrix, with experimental Raman data. We show that, upon densification, the position of the Boson peak shifts towards higher frequencies while its magnitude decreases which is in agreement with a recent experimental study.

4 pages including 3 figures. Accepted for publication in J. Chem. Phys

References in corpus (2)

• Molecular dynamics calculation of the thermal conductivity of vitreous silica
• The Raman coupling function in amorphous silica and the nature of the long wavelength excitations in disordered systems

Cited by in corpus (6)

• Pressure dependence of the Boson peak in glasses
• Low-energy excess of vibrational states in v-SiO2: the role of transverse dynamics
• Vibrations in glasses and Euclidean Random Matrix theory
• Brillouin and Boson peaks in Glasses from vector Euclidean Random Matrix Theory
• Classical molecular dynamics simulations of amorphous silica surfaces
• Microscopic dynamics of molecular liquids and glasses: Role of orientations and translation-rotation coupling