Role of unstable directions in the equilibrium and aging dynamics of supercooled liquids

被引：67

作者：

Donati, C ^{[1
]}

Sciortino, F ^{[1
]}

Tartaglia, P ^{[1
]}

机构：

[1] Univ Roma La Sapienza, Dipartimento Fis, Ist Nazl Fis Mat, I-00185 Rome, Italy

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.85.1464

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The connectivity of the potential energy landscape in supercooled atomic liquids is investigated through a calculation of the instantaneous normal modes spectrum and a detailed analysis of the unstable directions in configuration space. We confirm the hypothesis that the mode-coupling critical temperature is the T at which the dynamics crosses over from free to activated exploration of configuration space. We also observe changes in the local connectivity of configuration space sampled during aging, following a temperature jump from a liquid to a glassy state.

引用

页码：1464 / 1467

页数：4

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