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Observation of the onset of strong scattering on high frequency acoustic phonons in densified silica glass

B. Ruffle·M. Foret·E. Courtens·R. Vacher·G. Monaco
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Abstract

The linewidth of longitudinal acoustic waves in densified silica glass is obtained by inelastic x-ray scattering. It increases with a high power alpha of the frequency up to a crossover where the waves experience strong scattering. We find that αis at least 4, and probably larger. Resonance and hybridization of acoustic waves with the boson-peak modes seems to be a more likely explanation for these findings than Rayleigh scattering from disorder.

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B. Ruffle, M. Foret, E. Courtens, R. Vacher, G. Monaco. 2003-01-24. Observation of the onset of strong scattering on high frequency acoustic phonons in densified silica glass. https://doi.org/10.1103/physrevlett.90.095502

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