Boson peak and its relation to acoustic attenuation in glasses

被引：93
|
作者：
Ruffle, B. [1 ]
Parshin, D. A. [1 ,2 ]
Courtens, E. [1 ]
Vacher, R. [1 ]
机构：
[1] Univ Montpellier 2, CNRS, UMR 5587, Lab Colloides Verres & Nanomat, F-34095 Montpellier 5, France
[2] St Petersburg State Tech Univ, St Petersburg 195251, Russia
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 01期
关键词：
D O I：
10.1103/PhysRevLett.100.015501
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Experimental results on the density of states and on the acoustic modes of glasses in the THz region are compared to the predictions of two categories of models. A recent one, solely based on an elastic instability, does not account for most observations. Good agreement without adjustable parameters is obtained with models including the existence of nonacoustic vibrational modes at THz frequency, providing in many cases a comprehensive picture for a range of glass anomalies.
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页数：4
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