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

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

2002-09-23

arxiv.org/abs/cond-mat/0209519v2

Physics

Condensed Matter

Disordered Systems and Neural Networks

8 pages, 4 figures

Scientific paper

We 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.

Affiliated with

Also associated with

No associations

Rating

Transverse acoustic nature of the excess of vibrational states in vitreous silica does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Transverse acoustic nature of the excess of vibrational states in vitreous silica, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transverse acoustic nature of the excess of vibrational states in vitreous silica will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-576437