Universal relation between viscous flow and fast dynamics in glass-forming materials

被引：30

作者：

Scopigno, T. ^{[1
]}

Cangialosi, D. ^{[2
]}

Ruocco, G. ^{[1
]}

机构：

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

[2] EHU, UPV, CSIC, CFM, San Sebastian 20080, Spain

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 10期

基金：

欧洲研究理事会;

关键词：

STRUCTURAL RELAXATION; BRILLOUIN-SCATTERING; POISSONS RATIO; DIELECTRIC-RELAXATION; VIBRATIONAL DYNAMICS; FRAGILITY; LIQUIDS; THERMODYNAMICS; TRANSITION; DEPENDENCE;

D O I：

10.1103/PhysRevB.81.100202

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The connection between viscous flow and vibrational properties in glass-forming materials is scrutinized examining the fragility of a wide set of liquids and the nonergodicity factor of the corresponding glasses. Building on the same line of reasoning which allows us to extend the connection between viscosity and thermodynamics in complex systems, we show here how the two quantities are strongly correlated once the effect of those secondary relaxation processes due to internal degrees of freedom is correctly accounted for. This result provides a missing thermodynamic rationale for the recently debated universality of the correlation between fast and slow degrees of freedom.

引用

页数：4

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