Vitreous silica distends in helium gas: acoustic vs. static compressibilities
arXiv:1302.1668 · doi:10.1103/PhysRevLett.109.245504
Abstract
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 in the pressure dependence of the compressibility is suppressed by He incorporation into the silica network. This shows that the elastic anomaly relates to the collapse of the largest interstitial voids in the structure. The huge difference between the static and the acoustic compressibilities indicates that the amount of incorporated helium still increases at 6 GPa.
arXiv comment5 pages, 4 figures
References in corpus (3)
- Anharmonic vs. relaxational sound damping in glasses: II. Vitreous silica
- Scaling the Temperature-dependent Boson Peak of Vitreous Silica with the high-frequency Bulk Modulus derived from Brillouin Scattering Data
- Anharmonic vs. relaxational sound damping in glasses: I. Brillouin scattering from densified silica