Peculiar suppression of the specific heat and boson peak intensity of densified SiO2 glass

被引：59

作者：

Inamura, Y

Arai, M

Yamamuro, O

Inaba, A

Kitamura, N

Otomo, T

Matsuo, T

Bennington, SM

Hannon, AC

机构：

[1] KEK, Inst Mat Struct Sci, Tsukuba, Ibaraki 305, Japan

[2] Osaka Univ, Dept Chem, Toyonaka, Osaka 560, Japan

[3] Govt Ind Res Inst, Ikeda, Osaka 563, Japan

[4] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

来源：

PHYSICA B-CONDENSED MATTER | 1999年 / 263卷

关键词：

densification effects; low-energy dynamics; vitreous silica;

D O I：

10.1016/S0921-4526(98)01362-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Low-energy dynamics of normal and densified vitreous silica was investigated by neutron scattering combined with the specific heat measurements. A large evolution of the Boson peak was clarified to be a suppression of the density of states at low energy, but not a peak shift as observed by Raman scattering. These results are inconsistent with a scenario based on a phonon scattering by a local density fluctuation, bur consistent with soft potential model and a recent model by Nakayama. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：299 / 302

页数：4

共 11 条

[1] ANHARMONIC POTENTIALS AND VIBRATIONAL LOCALIZATION IN GLASSES [J].