Boson peak in an harmonic scalar model

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dc.creatorGrigera, T. S.
dc.creatorMartin-Mayor, V.
dc.creatorParisi, G.
dc.creatorVerrocchio, P.
dc.date2001-10-07
dc.date.accessioned2026-07-07T02:42:57Z
dc.date.available2026-07-07T02:42:57Z
dc.descriptionWe study, analytically and numerically, an off-lattice model of scalar harmonic vibrations for structural glasses. The model has a Boson-Peak which we argue can be considered as a prototype for materials with a Boson Peak frequency that decreases with lowering temperature. The density evolution of the Boson Peak in silica is qualitatively reproduced. The dispersion relation is linear at the Boson Peak frequency, in agreement with experiments. In our model the Boson Peak is a precursor of a nearby mechanical instability. The Boson Peak is built up by the hybridization of the sound waves with extended, but non propagating (in the sense of a flat dispersion relation), modes.
dc.description4 pages, 3 postscript figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0110129
dc.identifierhttp://arxiv.org/abs/cond-mat/0110129
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/18350
dc.subjectCondensed Matter
dc.titleBoson peak in an harmonic scalar model
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