Transverse acoustic nature of the excess of vibrational states in vitreous silica

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dc.creatorPilla, O.
dc.creatorCaponi, S.
dc.creatorFontana, A.
dc.creatorMontagna, M.
dc.creatorRossi, F.
dc.creatorViliani, G.
dc.creatorAngelani, L.
dc.creatorRuocco, G.
dc.creatorMonaco, G.
dc.creatorSette, F.
dc.date2002-09-23
dc.date2003-03-20
dc.date.accessioned2026-07-07T02:47:23Z
dc.date.available2026-07-07T02:47:23Z
dc.descriptionWe present a numerical simulation study of the density-dependence (rho = 2.2 - 4.0 g/cm^3) of the high-energy collective dynamics in vitreous silica at mesoscopic wavevectors (Q = 1 - 18 nm^-1). The density-dependence of the longitudinal and transverse current spectra provides evidence that the excess modes observed in the density of states of this and many other glasses, i.e. the Boson Peak, arises from the high-Q limit of the quasi-transverse acoustic branch. This conclusion emerges from the comparison of the numerical results with the experimentally observed energy-shift and intensity variation of the Boson Peak with increasing density.
dc.description8 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0209519
dc.identifierhttp://arxiv.org/abs/cond-mat/0209519
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19992
dc.subjectDisordered Systems and Neural Networks
dc.titleTransverse acoustic nature of the excess of vibrational states in vitreous silica
dc.typetext

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