On the origin of dynamic heterogeneities in glass-forming liquids

被引：31

作者：

Qian, J ^{[1
]}

Hentschke, R ^{[1
]}

Heuer, A ^{[1
]}

机构：

[1] Max Planck Inst Polymerforsch, D-55021 Mainz, Germany

来源：

JOURNAL OF CHEMICAL PHYSICS | 1999年 / 111卷 / 22期

关键词：

D O I：

10.1063/1.480368

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：

We employ classical Molecular Dynamics simulations to study the cooperative dynamics of two low molecular weight glass-formers, propylene carbonate and salol. The length scales of dynamic heterogeneities are estimated. After appropriate scaling both glass-formers display a similar temperature dependence of this length scale. Local structural properties like density, regularity, and potential energy are correlated with different local dynamical observables. We find that the dynamic heterogeneities are most strongly related to the local potential energy. To obtain an optimum correlation the local dynamics has to be characterized by the residence time. (C) 1999 American Institute of Physics. [S0021-9606(99)50346-2].

引用

页码：10177 / 10182

页数：6

共 31 条

[1] ON TEMPERATURE DEPENDENCE OF COOPERATIVE RELAXATION PROPERTIES IN GLASS-FORMING LIQUIDS [J].