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
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发表时间:
2003
影响因子:
8.6
通讯作者:
S. Yannopoulos
中科院分区:
文献类型:
--
作者:
T. Scopigno;R. Di Leonardo;G. Ruocco;A. Baron;S. Tsutsui;F. Bossard;S. Yannopoulos
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