The Dynamics of Supercooled Silica: Acoustic modes and Boson peak
Juergen Horbach, Walter Kob, Kurt Binder
Abstract
Using molecular dynamics computer simulations we investigate the dynamics of supercooled silica in the frequency range 0.5-20~THz and the wave-vector range 0.13-1.1Å-1. We find that for small wave-vectors the dispersion relations are in very good agreement with the ones found in experiments and that the frequency at which the boson-peak is observed shows a maximum at around 0.39Å-1.
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