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arXiv 1104.3157cond-mat.mtrl-scicond-mat.soft
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用相场晶体模拟玻璃形成过程中的多时间尺度

Modeling multiple time scales during glass formation with phase-field crystals

Joel Berry, Martin Grant

摘要:

本文用微观场论研究了单原子和二元液体中玻璃形成的动力学过程,讨论了时均原子序数密度的演化。相场晶体自由能和动态密度泛函理论相结合的随机框架,成功地描述了几个方面的玻璃形成在多个时间尺度。与模式耦合理论的协议被证明为欠阻尼液体在中等过冷度,和一个快速增长的动态相关长度被发现与脆弱的行为。

英文摘要:

The dynamics of glass formation in monatomic and binary liquids are studied numerically using a microscopic field theory for the evolution of the time-averaged atomic number density. A stochastic framework combining phase field crystal free energies and dynamic density functional theory is shown to successfully describe several aspects of glass formation over multiple time scales. Agreement with mode coupling theory is demonstrated for underdamped liquids at moderate supercoolings, and a rapidly growing dynamic correlation length is found to be associated with fragile behavior.

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。

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