Spectrum of fast dynamics in glass forming liquids: Does the "knee'' exist?

被引：68

作者：

Gapinski, J ^{[1
]}

Steffen, W

Patkowski, A

Sokolov, AP

Kisliuk, A

Buchenau, H

Russina, M

Mezei, F

Schober, H

机构：

[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

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

[3] Free Univ Berlin, Inst Phys Expt, D-14195 Berlin, Germany

[4] Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany

[5] ILL, F-38190 Grenoble, France

[6] Adam Mickiewicz Univ Poznan, Inst Phys, Poznan, Poland

[7] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 1999年 / 110卷 / 05期

关键词：

D O I：

10.1063/1.477966

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A knee-shaped feature observed earlier in light scattering spectra of Ca(0.4)K(0.3)(NO(3))(1.4) (CKN) below T(c) is used as a strong argument in favor of mode- coupling theory of the glass transition (MCT). Our careful measurements reveal no "knee" in the spectra of two glass forming liquids, CKN and ortho- terphenyl. Instead of the knee the spectra show nontrivial broadening and an increase of the intensity with a temperature increase. Both variations are confirmed by neutron scattering measurements on CKN and are neither expected in the asymptotic MCT predictions nor in any other model. (C) 1999 American Institute of Physics. [S0021-9606(99)51605-X].

引用

页码：2312 / 2315

页数：4

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