Fluctuation-dissipation relations and energy landscape in an out-of-equilibrium strong-glass-forming liquid

被引：8

作者：

Scala, A

Valeriani, C

Sciortino, F

Tartaglia, P

机构：

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

[2] Univ Roma La Sapienza, INFM, Ctr Stat Mech & Complex, I-00185 Rome, Italy

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.90.115503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the out-of-equilibrium dynamics following a temperature jump in a model for silica, a strong liquid, and compare it with the well known case of fragile liquids. We calculate the fluctuation-dissipation relation, from which it is possible to estimate an effective temperature T-eff associated with the slow out-of-equilibrium structural degrees of freedom. We find the striking and unexplained result that, different from the fragile liquid cases, T-eff is smaller than the bath temperature.

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页数：4

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