Sound wave scattering in network glasses

被引：47
|
作者：
Matic, A [1 ]
Engberg, D
Masciovecchio, C
Börjesson, L
机构：
[1] Chalmers Univ Technol, Dept Appl Phys, S-41296 Gothenburg, Sweden
[2] Sincrotrone Elettra, I-34012 Trieste, Italy
来源：
PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 17期
关键词：
D O I：
10.1103/PhysRevLett.86.3803
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The acoustic branch of two network glasses, (Li2O)(x)B2O3 (x = 0.25 and 0.5), is followed over a large momentum transfer range 1- 12 nm(-1), using inelastic x-ray scattering. We observe the transition from propagating modes to a region of strong scattering as the Ioffe-Regel limit is reached. PI region of Rayleigh scattering of the acoustic modes precedes the strong scattering regime at larger Q, causing a rapid decrease of the mean-free path of the modes.
引用
收藏
页码：3803 / 3806
页数：4
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