Phys. Rev. B 56, R481–R484 (1997)Mean free path of high-frequency acoustic excitations in glasses with application to vitreous silica
Direct spectroscopic information on the frequency and temperature dependences of acoustic-phonon damping in vitreous silica is reconsidered. It points to the essential role played by Rayleigh scattering of the phonons, in quantitative agreement with thermal properties at low temperatures. A picture is proposed that consistently unifies thermal properties with all the available spectroscopic results. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.56.R481
DOI:
10.1103/PhysRevB.56.R481
PACS:
63.50.+x, 78.35.+c, 78.70.-g
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