Sound attenuation in a unexplored frequency region: Brillouin ultraviolet light scattering measurements in v-Si O2

P. Benassi*, S. Caponi, R. Eramo, A. Fontana, Andrea Giugni, M. Nardone, M. Sampoli, G. Viliani

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

We report ultraviolet Brillouin light-scattering experimental data on v-Si O2 in an unexplored frequency region, performed with a newly available spectrometer, up to exchanged wave vector q values of 0.075 nm-1, at different temperatures. The measured attenuation follows a q2 law and is temperature dependent. Such temperature dependence is found to be in good agreement with that measured at lower q, suggesting that the broadening of the Brillouin peak is mainly due to a dynamic attenuation mechanism. The comparison of the present data with those obtained by inelastic x-ray and visible scattering indicates the existence of a crossover among different attenuation mechanisms, whose nature is briefly discussed.

Original languageEnglish (US)
Article number172201
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number17
DOIs
StatePublished - Dec 13 2005

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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