193 citations · 529 across the 10 of their papers we have counts for
10 papers
Hard X-rays as pump and probe of atomic motion in oxide glasses
B. Ruta, F. Zontone, Y. Chushkin +5
Nowadays powerful X-ray sources like synchrotrons and free-electron lasers are considered as ultimate tools for probing microscopic properties in materials. However, the correct in…
Vitreous silica distends in helium gas: acoustic vs. static compressibilities
Coralie Weigel, Alain Polian, Mathieu Kint +3
Sound velocities of vitreous silica are measured under He compression in the pressure range 0-6 GPa by Brillouin light scattering. It is found that the well-known anomalous maximum…
VUV Brillouin scattering from superpolished vitreous silica
B. Rufflé, E. Courtens, M. Foret
A previous inelastic UV scattering experiment on silica glass is reproduced using a high grade superpolished sample. In the pristine sample condition, surface scattering is not obs…
Eliminating the broadening by finite aperture in Brillouin spectroscopy
R. Vialla, B. Rufflé, G. Guimbretière +1
We present a new optical arrangement which allows to avoid the broadening by finite aperture in Brillouin spectroscopy. In this system, all the rays scattered at the same angle by…
Scaling the Temperature-dependent Boson Peak of Vitreous Silica with the high-frequency Bulk Modulus derived from Brillouin Scattering Data
B. Rufflé, S. Ayrinhac, E. Courtens +4
The position and strength of the boson peak in silica glass vary considerably with temperature . Such variations cannot be explained solely with changes in the Debye energy. New…
The Boson Peak and its Relation with Acoustic Attenuation in Glasses
B. Rufflé, D. A. Parshin, E. Courtens +1
Experimental results on the density of states and on the acoustic modes of glasses in the THz region are compared to the predictions of two categories of models. A recent one, sole…
Acoustic damping in LiO-2BO glass observed by inelastic x-ray and optical Brillouin scattering
B. Rufflé, G. Guimbretière, E. Courtens +2
The dynamic structure factor of lithium-diborate glass has been measured at several values of the momentum transfer using high resolution inelastic x-ray scattering. Much atten…
Glass-specific behavior in the damping of acoustic-like vibrations
B. Rufflé, G. Guimbretière, E. Courtens +2
High frequency sound is observed in lithium diborate glass, LiO--2BO, using Brillouin scattering of light and x-rays. The sound attenuation exhibits a non-trivial depen…
The crossover from propagating to strongly scattered acoustic modes of glasses observed in densified silica
E. Courtens, M. Foret, B. Hehlen +2
Spectroscopic results on low frequency excitations of densified silica are presented and related to characteristic thermal properties of glasses. The end of the longitudinal acoust…
Observation of the onset of strong scattering on high frequency acoustic phonons in densified silica glass
B. Ruffle, M. Foret, E. Courtens +2
The linewidth of longitudinal acoustic waves in densified silica glass is obtained by inelastic x-ray scattering. It increases with a high power alpha of the frequency up to a cros…