Low-temperature phonon damping in vitreous silica explored by UV Brillouin spectroscopy

G. Baldi; S. Caponi; A. Fontana; P. Benassi; A. Giugni; M. Nardone; M. Sampoli

doi:10.1080/14786430600891360

Low-temperature phonon damping in vitreous silica explored by UV Brillouin spectroscopy

G. Baldi^*, S. Caponi, A. Fontana, P. Benassi, A. Giugni, M. Nardone, M. Sampoli

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The recently developed technique of Brillouin ultraviolet scattering is used to measure phonon dispersion and damping in the prototypical strong glass v-SiO2. Results on the low temperature (T∼10-100K) sound attenuation at a frequency of ∼66GHz are presented. The comparison between a model, which takes into account dynamical processes (thermally activated relaxations and the interaction with the bath of thermal vibrations), and the experimental data indicates the presence of a strong static contribution in the region explored by ultraviolet radiation, supporting the presence of a transition between static and dynamic attenuation mechanisms at a frequency of ∼100GHz.

Original language	English (US)
Pages (from-to)	603-612
Number of pages	10
Journal	Philosophical Magazine
Volume	87
Issue number	3-5
DOIs	https://doi.org/10.1080/14786430600891360
State	Published - Jan 2007
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics

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10.1080/14786430600891360

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title = "Low-temperature phonon damping in vitreous silica explored by UV Brillouin spectroscopy",

abstract = "The recently developed technique of Brillouin ultraviolet scattering is used to measure phonon dispersion and damping in the prototypical strong glass v-SiO2. Results on the low temperature (T∼10-100K) sound attenuation at a frequency of ∼66GHz are presented. The comparison between a model, which takes into account dynamical processes (thermally activated relaxations and the interaction with the bath of thermal vibrations), and the experimental data indicates the presence of a strong static contribution in the region explored by ultraviolet radiation, supporting the presence of a transition between static and dynamic attenuation mechanisms at a frequency of ∼100GHz.",

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AU - Baldi, G.

AU - Caponi, S.

AU - Fontana, A.

AU - Benassi, P.

AU - Giugni, A.

AU - Nardone, M.

AU - Sampoli, M.

PY - 2007/1

Y1 - 2007/1

N2 - The recently developed technique of Brillouin ultraviolet scattering is used to measure phonon dispersion and damping in the prototypical strong glass v-SiO2. Results on the low temperature (T∼10-100K) sound attenuation at a frequency of ∼66GHz are presented. The comparison between a model, which takes into account dynamical processes (thermally activated relaxations and the interaction with the bath of thermal vibrations), and the experimental data indicates the presence of a strong static contribution in the region explored by ultraviolet radiation, supporting the presence of a transition between static and dynamic attenuation mechanisms at a frequency of ∼100GHz.

AB - The recently developed technique of Brillouin ultraviolet scattering is used to measure phonon dispersion and damping in the prototypical strong glass v-SiO2. Results on the low temperature (T∼10-100K) sound attenuation at a frequency of ∼66GHz are presented. The comparison between a model, which takes into account dynamical processes (thermally activated relaxations and the interaction with the bath of thermal vibrations), and the experimental data indicates the presence of a strong static contribution in the region explored by ultraviolet radiation, supporting the presence of a transition between static and dynamic attenuation mechanisms at a frequency of ∼100GHz.

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SP - 603

EP - 612

JO - Philosophical Magazine

JF - Philosophical Magazine

IS - 3-5

ER -

Low-temperature phonon damping in vitreous silica explored by UV Brillouin spectroscopy

Abstract

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