Nonperturbative effects of attraction on dynamical behaviors of glass-forming liquids
Nonperturbative effects of attraction on dynamical behaviors of glass-forming liquids
复制标题
吸引力对玻璃形成液体动力学行为的非微扰效应
DOI：
10.1088/1674-1056/abbbdd
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Zexin Zhang
中科院分区：
文献类型：
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作者：
Xiaoyan Sun;Haibo Zhang;Lijin Wang;Zexin Zhang;Zexin Zhang
通过分子动力学模拟，系统地研究了粒子间引力对玻璃形成液体结构和动力学行为的影响。我们发现粒子间的吸引力并不影响系统的结构，但极大地影响了系统的动力学和动力学不均匀性。当系统从纯排斥性玻璃形成液体变为吸引性玻璃形成液体后，动力学变慢，动力学不均匀性变大，有趣的是，这与较大的协同重排区域（CRR）有关。此外，CRRs的结构被观察到是紧凑的有吸引力的玻璃形成液体，但在纯排斥的弦状。我们的研究结果构成了一个重要的贡献，正在进行的研究的吸引力的作用，玻璃和玻璃形成液体的性质。
We investigate systematically the effects of the inter-particle attraction on the structure and dynamical behaviors of glass-forming liquids via molecular dynamics simulations. We find that the inter-particle attraction does not influence the structure, but greatly affects the dynamics and dynamical heterogeneity of the system. After the system changes from a purely repulsive glass-forming liquid to an attractive one, the dynamics slows down and the dynamical heterogeneity becomes greater, which is found interestingly to be associated with larger cooperative rearrangement regions (CRRs). Additionally, the structures of CRRs are observed to be compact in attractive glass-forming liquids but string-like in purely repulsive ones. Our findings constitute an important contribution to the ongoing study of the role of attractions in properties of glasses and glass-forming liquids.