Rufflé B, Foret M, Courtens E, Vacher R, Monaco G
Laboratoire des Verres, UMR 5587 CNRS, Université Montpellier 2, F-34095 Montpellier, France.
Phys Rev Lett. 2003 Mar 7;90(9):095502. doi: 10.1103/PhysRevLett.90.095502. Epub 2003 Mar 3.
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 crossover where the waves experience strong scattering. We find that alpha is at least 4, and probably larger. Resonance and hybridization of acoustic waves with the boson-peak modes seems to be a more likely explanation for these findings than Rayleigh scattering from disorder.
通过非弹性X射线散射获得了致密石英玻璃中纵向声波的线宽。它随着频率的高幂指数α增加，直至波经历强散射的交叉点。我们发现α至少为4，可能更大。与玻色子峰模式的声波共振和杂化似乎比无序引起的瑞利散射更有可能解释这些发现。
