Acoustic attenuation in glasses and its relation with the boson peak
| dc.creator | Schirmacher, W. | |
| dc.creator | Ruocco, G. | |
| dc.creator | Scopigno, T. | |
| dc.date | 2007-01-05 | |
| dc.date.accessioned | 2026-07-07T07:38:46Z | |
| dc.date.available | 2026-07-07T07:38:46Z | |
| dc.description | A theory for the vibrational dynamics in disordered solids [W. Schirmacher, Europhys. Lett. {\bf 73}, 892 (2006)], based on the random spatial variation of the shear modulus, has been applied to determine the wavevector ($k$) dependence of the Brillouin peak position ($Ω_k)$ and width ($Γ_k$), as well as the density of vibrational states ($g(ω)$), in disordered systems. As a result, we give a firm theoretical ground to the ubiquitous $k^2$ dependence of $Γ_k$ observed in glasses. Moreover, we derive a quantitative relation between the excess of the density of states (the boson peak) and $Γ_k$, two quantities that were not considered related before. The successful comparison of this relation with the outcome of experiments and numerical simulations gives further support to the theory. | |
| dc.description | To appear on PRL | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0701112 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0701112 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/121212 | |
| dc.subject | Materials Science | |
| dc.title | Acoustic attenuation in glasses and its relation with the boson peak | |
| dc.type | text |