Statistical mechanical approach to secondary processes and structural relaxation in glasses and glass formers

被引：0
|
作者：
Crisanti, A. [1 ,2 ]
Leuzzi, L. [2 ,3 ]
Paoluzzi, M. [3 ,4 ]
机构：
[1] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[2] CNR ISC, I-00185 Rome, Italy
[3] UOS Roma Kerberos, CNR IPCF, I-00185 Rome, Italy
[4] Univ Roma Tre, Dipartimento Fis, I-00184 Rome, Italy
来源：
EUROPEAN PHYSICAL JOURNAL E | 2011年 / 34卷 / 09期
关键词：
MEAN-FIELD-THEORY; BETA-RELAXATION; VISCOUS-LIQUIDS; SPIN-GLASSES; SUPERCOOLED LIQUIDS; DYNAMICS; TRANSITION; MODEL; TIME; SUSCEPTIBILITY;
D O I：
10.1140/epje/i2011-11098-3
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The interrelation of dynamic processes active on separated time-scales in glasses and viscous liquids is investigated using a model displaying two time-scale bifurcations both between fast and secondary relaxation and between secondary and structural relaxation. The study of the dynamics allows for predictions on the system relaxation above the temperature of dynamic arrest in the mean-field approximation, that are compared with the outcomes of the equations of motion directly derived within the Mode Coupling Theory (MCT) for under-cooled viscous liquids. By varying the external thermodynamic parameters, a wide range of phenomenology can be represented, from a very clear separation of structural and secondary peak in the susceptibility loss to excess wing structures.
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页数：8
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