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arXiv 1602.07589cond-mat.stat-mechcond-mat.dis-nn
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二元Lennard-Jones混合物的非活性态结构

Structure of inactive states of a binary Lennard-Jones mixture

Daniele Coslovich, Robert L. Jack

摘要:

我们研究了一个原型模型玻璃,Kob-Andersen二元Lennard-Jones混合物的非活性态的结构。这些非活性态通过跃迁路径采样获得,并且与活性平衡态处于动力学相共存。处于非活动状态的氢在动力学上是稳定的,并且位于比其活动对应物更深的能量景观盆地中。通过分析非活动状态内的轨迹波动,我们评估动力学稳定性,能量和其他结构特性之间的相关性。我们发现,措施的地方秩序与稳定的地方包装和债券取向顺序弱相关的能量和动力学稳定性。我们讨论了什么样的结构测量可以捕捉到相关的动力学特征的非活动状态。

英文摘要:

We study the structure of inactive states in a prototypical model glass, the Kob-Andersen binary Lennard-Jones mixture. These inactive states are obtained by transition path sampling and are at dynamical phase coexistence with an active equilibrium state. Configurations in the inactive states are kinetically stable and are located in deeper basins of the energy landscape than their active counterparts. By analyzing trajectory-to-trajectory fluctuations within the inactive state, we assess correlations between kinetic stability, energy and other structural properties. We show that measures of local order associated to stable local packings and bond-orientational order are weakly correlated with energy and kinetic stability. We discuss what kinds of structural measurement might capture the relevant dynamical features of the inactive state.

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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