BRILLOUIN-SCATTERING STUDY OF THE LIQUID-GLASS TRANSITION IN CAKNO3 - MODE-COUPLING ANALYSIS

被引：42

作者：

TAO, NJ ^{[1
]}

LI, G ^{[1
]}

CUMMINS, HZ ^{[1
]}

机构：

[1] CUNY CITY COLL, DEPT PHYS, NEW YORK, NY 10031 USA

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.45.686

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polarized and depolarized Brillouin scattering from 0.4 Ca(NO3)2-0.6KNO3 was investigated in the temperature range of 320 to 640 K using a six-pass Sandercock tandem Fabry-Perot interferometer. The polarized spectra were analyzed with a simplified version of mode-coupling theory, in which the small-q density fluctuation modes probed by light scattering couple only to pairs of modes at q0 corresponding to the first peak in the structure factor S(q). The density correlation function phi(q0,t) determined by neutron spin-echo experiments by Mezei et al. was used as input in the analysis, producing excellent fits to the experimental data. The depolarized spectra were analyzed with a phenomenological viscoelastic model including NO3- orientational relaxation.

引用

页码：686 / 696

页数：11

共 65 条

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