LIGHT-SCATTERING IN DISORDERED SOLIDS

被引：1

作者：

FONTANA, A

机构：

[1] Dipartimento di Fisica, Università di Trento, 38050 Povo, Trento

来源：

PHYSICA A | 1992年 / 191卷 / 1-4期

关键词：

D O I：

10.1016/0378-4371(92)90549-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Low frequency Raman scattering experiments have been performed on borate glasses, phosphate glasses, and amorphous silica from liquid helium temperature to room temperature. We are able to separate the light scattering excess from the scattering due to acoustic modes in a quantitative way. We have found that at low frequency the product C(omega) g(omega) has an omega4 behaviour. The light scattering excess has a Lorentzian-like shape, and its intensity increases at increasing the temperature in an exponential way. Moreover we have found that the models based on two level systems fall in the description of the behaviour of the light scattering excess intensity as a function of temperature

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页码：339 / 347

页数：9

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