Non-dynamic origin of the acoustic attenuation at high frequency in glasses

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dc.creatorRuocco, G.
dc.creatorSette, F.
dc.creatorDi Leonardo, R.
dc.creatorFioretto, D.
dc.creatorLorenzen, M.
dc.creatorKrisch, M.
dc.creatorMasciovecchio, C.
dc.creatorMonaco, G.
dc.creatorPignon, F.
dc.creatorScopigno, T.
dc.date1999-11-02
dc.date.accessioned2026-07-07T03:14:58Z
dc.date.available2026-07-07T03:14:58Z
dc.descriptionThe sound attenuation in the THz region is studied down to T=16 K in glassy glycerol by inelastic x-ray scattering. At striking variance with the decrease found below 100 K in the GHz data, the attenuation in the THz range does not show any T dependence. This result i) indicates the presence of two different attenuation mechanisms, active respectively in the high and low frequency limits; ii) demonstrates the non-dynamic origin of the attenuation of THz sound waves, and confirms a similar conclusion obtained in SiO2 glass by molecular dynamics; and iii) supports the low frequency attenuation mechanism proposed by Fabian and Allen (Phys.Rev.Lett. 82, 1478 (1999)).
dc.description3 pages, 5 Figures, To be published in PRL
dc.identifierhttps://arxiv.org/abs/cond-mat/9911012
dc.identifierhttp://arxiv.org/abs/cond-mat/9911012
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/29878
dc.subjectDisordered Systems and Neural Networks
dc.titleNon-dynamic origin of the acoustic attenuation at high frequency in glasses
dc.typetext

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