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
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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