IMPULSIVE STIMULATED LIGHT SCATTERED FROM GLASS-FORMING LIQUIDS .2. SALOL RELAXATION DYNAMICS, NONERGODICITY PARAMETER, AND TESTING OF MODE-COUPLING THEORY

被引：64

作者：

YANG, YW

NELSON, KA

机构：

[1] Department of Chemistry, Massachusetts Institute of Technology, Cambridge

来源：

JOURNAL OF CHEMICAL PHYSICS | 1995年 / 103卷 / 18期

关键词：

D O I：

10.1063/1.470294

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：

Impulsive stimulated light scattering was used to investigate structural relaxation dynamics of the organic glass-former salol. Relaxation dynamics on ns-ms time scales are monitored in the 238.7-280.5 K temperature range and found to be described well by the Kohlrausch-Williams-Watts relaxation function. The nonergodicity parameter f(q) of mode-coupling theory (MCT) in the limit of the small wave vector q is evaluated. Its temperature dependence shows a square-root cusp at a crossover temperature of T-c=266 K, consistent with neutron scattering measurements at high q and with light scattering results. This supports the MCT prediction of a cusp in f(q)(T) at a q-independent temperature. (C) 1995 American Institute of Physics.

引用

页码：7732 / 7739

页数：8

共 27 条

[1] NEUTRON AND LIGHT-SCATTERING STUDY OF RELAXATION DYNAMICS IN A GLASS-FORMING FRAGILE MOLECULAR LIQUID [J].

BORJESSON, L ;

ELMROTH, M ;

TORELL, LM .

CHEMICAL PHYSICS, 1990, 149 (1-2) :209-220

[2] RELAXATIONAL DYNAMICS IN SUPERCOOLED LIQUIDS - EXPERIMENTAL TESTS OF THE MODE-COUPLING THEORY [J].

CUMMINS, HZ ;

LI, G ;

DU, WM ;

HERNANDEZ, J .

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 1994, 204 (1-4) :169-201

[3] FREQUENCY-DEPENDENT SPECIFIC-HEAT AND THERMAL-CONDUCTIVITY AT THE GLASS-TRANSITION IN ORTHO-TERPHENYL MIXTURES [J].

DIXON, PK ;

NAGEL, SR .

PHYSICAL REVIEW LETTERS, 1988, 61 (03) :341-344

[4] SPECIFIC-HEAT SPECTROSCOPY AND DIELECTRIC SUSCEPTIBILITY MEASUREMENTS OF SALOL AT THE GLASS-TRANSITION [J].

DIXON, PK .

PHYSICAL REVIEW B, 1990, 42 (13) :8179-8186

[5] BRILLOUIN-SCATTERING IN SALOL - DETERMINING T(C) OF THE MODE-COUPLING THEORY [J].

DREYFUS, C ;

LEBON, MJ ;

CUMMINS, HZ ;

TOULOUSE, J ;

BONELLO, B ;

PICK, RM .

PHYSICAL REVIEW LETTERS, 1992, 69 (25) :3666-3669

[6] LIGHT-SCATTERING STUDY OF THE LIQUID-GLASS TRANSITION IN PROPYLENE CARBONATE [J].

DU, WM ;

LI, G ;

CUMMINS, HZ ;

FUCHS, M ;

TOULOUSE, J ;

KNAUSS, LA .

PHYSICAL REVIEW E, 1994, 49 (03) :2192-2205

[7] OBSERVATION OF A DYNAMIC ANOMALY IN THE LIQUID-GLASS TRANSFORMATION RANGE BY BRILLOUIN-SCATTERING [J].

ELMROTH, M ;

BORJESSON, L ;

TORELL, LM .

PHYSICAL REVIEW LETTERS, 1992, 68 (01) :79-82

[8] TEMPERATURE-DEPENDENCE OF THE NONERGODICITY PARAMETER IN POLYBUTADIENE IN THE NEIGHBORHOOD OF THE GLASS-TRANSITION [J].

FRICK, B ;

FARAGO, B ;

RICHTER, D .

PHYSICAL REVIEW LETTERS, 1990, 64 (24) :2921-2924

[9] SOME COMMENTS ON THE ALPHA-RELAXATION DYNAMICS OF SUPERCOOLED CAKNO3 [J].

FUCHS, M ;

GOTZE, W ;

LATZ, A .

CHEMICAL PHYSICS, 1990, 149 (1-2) :185-196

[10]

GOTZE W, 1991, LES HOUCH S, V51, P287

← 1 2 3 →