Density dependence of the boson peak of vitreous silica

被引：32

作者：

Inamura, Y

Arai, M

Otomo, T

Kitamura, N

Buchenau, U

机构：

[1] KEK, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

[2] Govt Ind Res Inst Osaka, Ikeda, Osaka, Japan

[3] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

来源：

PHYSICA B-CONDENSED MATTER | 2000年 / 284卷

关键词：

glass; boson peak; intermediate range structure;

D O I：

10.1016/S0921-4526(99)02788-X

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Density dependence of low-energy dynamics of vitreous silica was investigated by means of neutron scattering measurements. On densification, the intensity of the boson peak is drastically suppressed at the low-energy region, and eventually its position shifts toward higher energy. From this result we conclude that the origin of the boson peak is not a phonon scattering by local density fluctuations but a soft mode of void space in vitreous silica. (C) 2000 Published by Elsevier Science B.V. All rights reserved.

引用

页码：1157 / 1158

页数：2

共 6 条

[1] A UNIFIED MODEL FOR THE LOW-ENERGY VIBRATIONAL BEHAVIOR OF AMORPHOUS SOLIDS [J].