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arXiv 0711.4490cond-mat.softcond-mat.stat-mech
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三维粒子质点系中的准二元非晶相

Quasi-binary amorphous phase in a 3D system of particles with repulsive-shoulder interactions

Yu. D. Fomin, Daan Frenkel, N. V. Gribova, V. N. Ryzhov, S. M. Stishov

摘要:

本文用计算机模拟研究了具有排斥阶跃势的三维质点系的平衡相图。利用自由能计算,我们确定了该系统的平衡相图。在低温下,我们观察到许多不同的晶相。然而,在某些条件下,该系统在液体表现出热稳定的状态下经历玻璃化转变。我们认为,这种无定形的低温相的外观可以理解,通过查看这一单组分系统作为一个伪二元混合物。

英文摘要:

We report a computer-simulation study of the equilibrium phase diagram of a three-dimensional system of particles with a repulsive step potential. Using free-energy calculations, we have determined the equilibrium phase diagram of this system. At low temperatures, we observe a number of distinct crystal phases. However, under certain conditions the system undergoes a glass transition in a regime where the liquid appears thermodynamically stable. We argue that the appearance of this amorphous low-temperature phase can be understood by viewing this one-component system as a pseudo-binary mixture.

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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