arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1107.1897cond-mat.dis-nncond-mat.softcond-mat.stat-mech
收藏

玻璃和玻璃形成体中二级过程和结构弛豫的统计力学方法

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

Andrea Crisanti, Luca Leuzzi, Matteo Paoluzzi

摘要:

动态过程的相互关系活跃在玻璃和粘性液体的分离的时间尺度上的研究使用的模型显示两个时间尺度的分叉之间的快速和二次弛豫和二次弛豫和结构之间。动力学的研究允许在平均场近似的动态逮捕的温度以上的系统弛豫的预测,与直接导出的运动方程的结果在模式耦合理论(MCT)过冷粘性液体。改变外部热力学参数,可以表现出很宽范围的现象学,从敏感性损失中结构峰和第二峰的非常清楚的分离到多余的机翼结构。

英文摘要:

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. 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑