Behavior of thermal phonons in amorphous media from 4 to 300 K
Behavior of thermal phonons in amorphous media from 4 to 300 K
复制标题
4 至 300 K 非晶介质中热声子的行为
DOI：
10.1103/physrevb.14.823
复制
发表时间：
1976
影响因子：
3.7
通讯作者：
J. Pelous
中科院分区：
文献类型：
--
作者：
R. Vacher;J. Pelous
在4 ~ 300 K温度范围内测量了石英晶体、熔融石英和硼硅酸盐玻璃中纵向布里渊散射线的强度、频移和线宽。斯托克斯和反斯托克斯成分之间的强度差异已经被发现，延伸到低温下观察到长寿命的振动态，占据数等于$（{{e}^{\frac{h\ensuremath{\nu}}{\mathrm{kT}\ensuremath{-}1）}^{\ensuremath{-}1}$。消除了熔融石英弹性性质的频率依赖性中的一些异常。在77 ~ 300 K之间的衰减测量修正了以前的结果，与10 K以下的受激布里渊散射测量结果吻合良好。
The intensity, frequency shift, and linewidth of the longitudinal Brillouin lines have been measured from 4 to 300 K in crystal quartz, fused quartz, and borosilicate glass. Differences in intensity between Stokes and anti-Stokes components have been found, extending to low temperatures the observation of long-lived vibrational states with occupation numbers equal to $({{e}^{\frac{h\ensuremath{\nu}}{\mathrm{kT}}}\ensuremath{-}1)}^{\ensuremath{-}1}$. Some anomalies in the frequency dependence of the elastic properties of fused quartz are eliminated. The measurements of the attenuation, which modify previous results between 77 and 300 K, are in good agreement with stimulated Brillouin scattering measurements below 10 K.