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

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

2000-05-10

arxiv.org/abs/cond-mat/0005169v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

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

Scientific paper

10.1063/1.1305861

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.

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