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Nonperturbative effects of attraction on dynamical behaviors of glass-forming liquids |
Xiaoyan Sun(孙晓燕)1, Haibo Zhang(张海波)2, Lijin Wang(王利近)3,†, Zexin Zhang(张泽新)2,4,‡, and Yuqiang Ma(马余强)5,\ccclink |
1 Wenzheng College of Soochow University, Suzhou 215104, China; 2 Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, China; 3 School of Physics and Materials Science, Anhui University, Hefei 230601, China; 4 College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China; 5 National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China |
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Abstract 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.
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Received: 13 August 2020
Revised: 10 September 2020
Accepted manuscript online: 28 September 2020
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PACS:
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64.70.P-
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(Glass transitions of specific systems)
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64.70.kj
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(Glasses)
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31.15.xv
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(Molecular dynamics and other numerical methods)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11704270, 12074275, and 11574222), Jiangsu Planned Projects for Postdoctoral Research Funds, the PAPD Program of Jiangsu Higher Education Institutions, and the Start-up Fund from Anhui University (Grant No. S020318001/02). |
Corresponding Authors:
†Corresponding author. E-mail: lijin.wang@ahu.edu.cn ‡Corresponding author. E-mail: zhangzx@suda.edu.cn §Corresponding author. E-mail: myqiang@nju.edu.cn
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Cite this article:
Xiaoyan Sun(孙晓燕), Haibo Zhang(张海波), Lijin Wang(王利近), Zexin Zhang(张泽新), and Yuqiang Ma(马余强)\ccclink Nonperturbative effects of attraction on dynamical behaviors of glass-forming liquids 2020 Chin. Phys. B 29 126201
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