Low-temperature phonon damping in vitreous silica explored by UV Brillouin spectroscopy

G. Baldi*, S. Caponi, A. Fontana, P. Benassi, Andrea Giugni, M. Nardone, M. Sampoli

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The recently developed technique of Brillouin ultraviolet scattering is used to measure phonon dispersion and damping in the prototypical strong glass v-SiO2. Results on the low temperature (T∼10-100K) sound attenuation at a frequency of ∼66GHz are presented. The comparison between a model, which takes into account dynamical processes (thermally activated relaxations and the interaction with the bath of thermal vibrations), and the experimental data indicates the presence of a strong static contribution in the region explored by ultraviolet radiation, supporting the presence of a transition between static and dynamic attenuation mechanisms at a frequency of ∼100GHz.

Original languageEnglish (US)
Pages (from-to)603-612
Number of pages10
JournalPhilosophical Magazine
Volume87
Issue number3-5
DOIs
StatePublished - Jan 1 2007

ASJC Scopus subject areas

  • Condensed Matter Physics

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