| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Intrinsic Features of an Ideal Glass |
| Deyan Sun1,3, Cheng Shang2, Zhipan Liu2, Xingao Gong3,4** |
1Department of Physics, East China Normal University, Shanghai 200062
2Department of Chemistry, Fudan University, Shanghai 200433
3Key Laboratory for Computational Physical Sciences (MOE), State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433
4Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093
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| Cite this article: |
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Deyan Sun, Cheng Shang, Zhipan Liu et al 2017 Chin. Phys. Lett. 34 026402 |
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Abstract In order to understand the long-standing problem of the nature of glass states, we perform intensive simulations on the thermodynamic properties and potential energy surface of an ideal glass. It is found that the atoms of an ideal glass manifest cooperative diffusion, and show clearly different behavior from the liquid state. By determining the potential energy surface, we demonstrate that the glass state has a flat potential landscape, which is the critical intrinsic feature of ideal glasses. When this potential region is accessible through any thermal or kinetic process, the glass state can be formed and a glass transition will occur, regardless of any special structural character. With this picture, the glass transition can be interpreted by the emergence of configurational entropies, as a consequence of flat potential landscapes.
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Received: 22 January 2017
Published: 25 January 2017
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| PACS: |
64.70.pe
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(Metallic glasses)
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61.43.Fs
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(Glasses)
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61.20.Ja
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(Computer simulation of liquid structure)
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65.80.-g
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(Thermal properties of small particles, nanocrystals, nanotubes, and other related systems)
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| Fund: Supported by the National Natural Science Foundation of China, and the National Basic Research Program of China. |
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