High frequency dynamics in a monatomic glass.

High frequency dynamics in a monatomic glass.
复制标题

单原子玻璃中的高频动力学。

DOI:
10.1103/physrevlett.92.025503
复制
发表时间:
2003
影响因子:
8.6
通讯作者:
S. Yannopoulos
S. Yannopoulos
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
T. Scopigno;R. Di Leonardo;G. Ruocco;A. Baron;S. Tsutsui;F. Bossard;S. Yannopoulos

文献摘要

参考文献

被引文献

相似文献

通过光束线 BL35XU (SPring-8) 处的非弹性 X 射线散射研究了玻璃态硒的高频动力学。高质量的数据使人们能够查明波矢量(Q)为1.5<Q<12.5 nm(-1)时是否存在色散声模式,从而有助于澄清先前实验结果与数值结果之间的矛盾。声速呈现正色散,在Q<3.5 nm(-1)时超过流体动力学值约10%。针对其他眼镜报告的声音衰减 Gamma(Q) 的 Q2 依赖性被发现是更一般的 Gamma(Q) 比例变体 Omega(Q)(2) 定律的低 Q 极限,该定律也适用于较高 Q 区域,其中 Omega(Q) 比例变体 Q 不再成立。
The high frequency dynamics of glassy selenium has been studied by inelastic x-ray scattering at beam line BL35XU (SPring-8). The high quality of the data allows one to pinpoint the existence of a dispersing acoustic mode for wave vectors (Q) of 1.5<Q<12.5 nm(-1), helping to clarify a previ-ous contradiction between experimental and numerical results. The sound velocity shows a positive dispersion, exceeding the hydrodynamic value by approximately 10% at Q<3.5 nm(-1). The Q2 dependence of the sound attenuation Gamma(Q), reported for other glasses, is found to be the low-Q limit of a more general Gamma(Q) proportional, variant Omega(Q)(2) law, which applies also to the higher Q region, where Omega(Q) proportional, variant Q no longer holds.
DOI: 10.1002/9783527602544
发表时间: 2003
期刊: --
影响因子: --
作者:
A. Kolobov
通讯作者: A. Kolobov