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摘要翻译：
通过分子动力学模拟，揭示了不同过冷Lennard-Jones二元混合物中等压脆性的系统变化。通过Voronoi结构分析了脆性与局部结构之间的联系。我们发现，属于局部优选结构的粒子团簇形成缓慢的、长寿命的畴，其空间扩展随着温度的降低而增加。一般说来，当过冷时，这种畴的快速生长与更明显的超阿伦纽斯行为有关，因此与更大的脆性有关。
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英文标题：
《Understanding fragility in supercooled Lennard-Jones mixtures. I.
Locally preferred structures》
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作者：
D. Coslovich and G. Pastore
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最新提交年份：
2007
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分类信息：
一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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一级分类：Physics 物理学
二级分类：Soft Condensed Matter 软凝聚态物质
分类描述：Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜，聚合物，液晶，玻璃，胶体，颗粒物质
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英文摘要：
We reveal the existence of systematic variations of isobaric fragility in different supercooled Lennard-Jones binary mixtures by performing molecular dynamics simulations. The connection between fragility and local structures in the bulk is analyzed by means of a Voronoi construction. We find that clusters of particles belonging to locally preferred structures form slow, long-lived domains, whose spatial extension increases by decreasing temperature. As a general rule, a more rapid growth, upon supercooling, of such domains is associated to a more pronounced super-Arrhenius behavior, hence to a larger fragility.
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PDF链接：
https://arxiv.org/pdf/705.0626
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