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arXiv 1907.01792cond-mat.mtrl-scicond-mat.soft
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Lennard-Jones三聚体的玻璃形成能力

Glass-forming ability of Lennard-Jones trimers

Ulf R. Pedersen

摘要:

本文测定了夹角为70 ° ~ 100 °的等腰Lennard-Jones三聚体体系在常压下的熔融温度。两种晶体结构被认为是:一个扭曲的体心立方结构和扭曲的面心立方结构的优先角分别为77和96度。当角度增加时,液体动力学减慢。83度的三聚体角产生等时线和熔融温度之间的最大距离,表明该值给出了最佳的玻璃形成能力。据证实,更好的玻璃形成者可能会发现在角度大于本研究中考虑的。

英文摘要:

Melting temperatures at ambient pressure of systems of isosceles Lennard-Jones trimers with angles ranging from 70 degrees to 100 degrees are determined. Two crystal structures are considered: a distorted body centered cubic structure and a distorted face centered cubic structure with preferred angles of 77 and 96 degrees, respectively. Liquid dynamics are slowed down when the angle is increased. A trimer angle of 83 degrees yields the largest distance between isochrones and the melting temperature, suggesting that this value gives the optimal glass-forming ability. It is conjectured that better glass-formers may be found at angles larger than the ones considered in this study.

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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