Laboratoire de Physico-Chimie des Matériaux Luminescents, Université de Lyon, Université Claude Bernard Lyon 1, UMR 5620 CNRS, 69622 Villeurbanne, France.
J Phys Condens Matter. 2010 Jan 20;22(2):025402. doi: 10.1088/0953-8984/22/2/025402. Epub 2009 Dec 10.
The evolution of the boson peak with densification at medium densification rates (up to 2.3%) in silicate glasses was followed through heat capacity measurements and low frequency Raman scattering. It is shown that the decrease of the boson peak induced by densification does not conform to that expected from a continuous medium; rather it follows a two step behaviour. The comparison of the heat capacity data with the Raman data shows that the light-vibration coupling coefficient is almost unaffected in this densification regime. These results are discussed in relation to the inhomogeneity of the glass elastic network at the nanometre scale.
通过热容测量和低频 Raman 散射研究了中密度（高达 2.3%）下硅酸盐玻璃的致密化过程中玻色峰的演化。结果表明，致密化引起的玻色峰降低不符合连续介质的预期，而是遵循两步行为。将热容数据与 Raman 数据进行比较表明，在这种致密化范围内，轻振动耦合系数几乎不受影响。这些结果与纳米尺度上玻璃弹性网络的非均匀性有关。
