Connected network of minima as a model glass: Long time dynamics

被引：122

作者：

Angelani, L ^{[1
]}

Parisi, G

Ruocco, G

Viliani, G

机构：

[1] Univ Aquila, I-67100 Laquila, Italy

[2] Ist Nazl Fis Mat, I-67100 Laquila, Italy

[3] Univ Roma La Sapienza, I-00185 Rome, Italy

[4] Ist Nazl Fis Nucl, I-00185 Rome, Italy

[5] Univ Trent, I-38050 Trent, Italy

[6] Ist Nazl Fis Mat, I-38050 Trent, Italy

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.81.4648

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A simple model to investigate the long time dynamics of glass formers is presented and applied to study a Lennard-Jones system in supercooled and glassy phases. According to our model, the point representing the system in the configurational phase space performs harmonic vibrations around (and activated jumps between) minima pertaining to a connected network. Exploiting the model, in agreement with the experimental results, we find evidence for (i) stretched relaxational dynamics, (ii) a strong T dependence of the stretching parameter, and (iii) breakdown of the Stokes-Einstein law. [S0031-9007(98)07786-2].

引用

页码：4648 / 4651

页数：4

共 30 条

[1]

ADAM G, 1972, J CHEM PHYS, V57, P470

[2] A study of the Debye-Stokes-Einstein law in supercooled fluids [J].