Intrinsic Features of an Ideal Glass
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 beh...
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| Published in | Chinese physics letters Vol. 34; no. 2; pp. 76 - 79 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.02.2017
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| Online Access | Get full text |
| ISSN | 0256-307X 1741-3540 |
| DOI | 10.1088/0256-307X/34/2/026402 |
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| Summary: | 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 fiat 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 conlgurational entropies, as a consequence of flat potential landscapes. |
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| Bibliography: | 11-1959/O4 Deyan Sun1,3, Cheng Shang2, Zhipan Liu2, Xingao Gong3,4 （1.Department of Physics, East China Normal University, Shanghai 200062 ; 2.Department of Chemistry, Fudan University, Shanghai 200433; 3. Key Laboratory for Computational Physical Sciences （MOE）, State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433; 4.Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093） 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 fiat 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 conlgurational entropies, as a consequence of flat potential landscapes. |
| ISSN: | 0256-307X 1741-3540 |
| DOI: | 10.1088/0256-307X/34/2/026402 |