Pressure-induced densification of vitreous silica: Insight from elastic properties

Autor: Coralie Weigel, René Vacher, Marouane Mebarki, Sébastien Clément, Marie Foret, Benoit Ruffle

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2019, 100 (9), pp.094102. ⟨10.1103/PhysRevB.100.094102⟩

\textit{In situ} high-pressure Brillouin light scattering experiments along loading-unloading paths are used to investigate the compressibility of vitreous silica. An accurate equation of state is obtained below \SI{9}{GPa} using sound velocities cor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::30622f3c1b0fb53e8a6ccefcd31c2b7b
https://doi.org/10.1103/physrevb.100.094102

Temperature dependence of hypersound attenuation in silica films via picosecond acoustics

Autor: Agnès Huynh, René Vacher, Aristide Lemaître, Bernard Perrin, X. Lafosse, Emmanuel Péronne, Benoit Ruffle, C. Gingreau, Marie Foret

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2017, 96 (17), pp.174206. ⟨10.1103/PhysRevB.96.174206⟩
Physical Review B
Physical Review B, 2017, 96 (17), pp.174206. ⟨10.1103/PhysRevB.96.174206⟩

International audience; We report picosecond acoustic measurements of longitudinal sound dispersion and attenuation in an amorphous SiO2 layer at temperatures from 20 to 300 K over frequencies ranging from about 40 to 200 GHz. The sample is a radio f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01b5115b4fe4e798d4e0ba2085d69af8
https://hal.archives-ouvertes.fr/hal-01653086/file/INSP_PRB2017-13.pdf

Low-Q Brillouin scattering from glasses

Autor: Benoit Ruffle, René Vacher, Eric Courtens

Publikováno v: Journal of Neutron Research. 14:361-366

A general framework for the understanding of Brillouin scattering spectra observed in glasses with light, X-rays, or neutrons is presented. Several sources of acoustic damping are discussed. Crossovers between different damping regimes can occur, dep

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::15963681d6affcde384ce771eee3405e
https://doi.org/10.1080/10238160601049120

Poroelastic Theory Applied to the Adsorption-Induced Deformation of Vitreous Silica

Autor: Alain Polian, Benoit Coasne, Benoit Ruffle, Mathieu Kint, Marie Foret, Julien Haines, René Vacher, Jérôme Rouquette, Coralie Weigel

Publikováno v: Journal of Physical Chemistry B
Journal of Physical Chemistry B, 2014, 118, pp.14519-14525. ⟨10.1021/jp5094383⟩
Journal of Physical Chemistry B, American Chemical Society, 2014, 118, pp.14519-14525. ⟨10.1021/jp5094383⟩

International audience; When vitreous silica is submitted to high pressures under helium atmosphere, the change in volume observed is much smaller than expected from its elastic properties. 1 It results from helium penetration into the interstitial f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::083c66daeb41b085fb0c5b440df1ca30
https://hal.science/hal-01101026

Hyper-Raman Scattering Observation of the Boson Peak in Vitreous Silica

Autor: Eric Courtens, René Vacher, Akio Yamanaka, Katsuya Inoue, Bernard Hehlen, M. Kataoka

Publikováno v: Physical Review Letters. 84:5355-5358

Hyper-Raman spectroscopy is used to investigate low frequency vibrations of various silica glasses. A strong boson peak is observed. The corresponding modes are inactive in infrared and Raman spectra, and are nonacoustic in nature. The shape of this

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b04438ef1a1feb566b2c0bfc39edaea2
https://doi.org/10.1103/physrevlett.84.5355