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Structural order as a genuine control parameter of dynamics in simple glass formers
Glass transition is characterised by drastic dynamical slowing down upon cooling, accompanied by growing spatial heterogeneity. Its rationalisation by subtle changes in the liquid structure has been long debated but remains elusive, due to intrinsic difficulty in detecting the underlying complex str...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6898187/ https://www.ncbi.nlm.nih.gov/pubmed/31811143 http://dx.doi.org/10.1038/s41467-019-13606-3 |
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author | Tong, Hua Tanaka, Hajime |
author_facet | Tong, Hua Tanaka, Hajime |
author_sort | Tong, Hua |
collection | PubMed |
description | Glass transition is characterised by drastic dynamical slowing down upon cooling, accompanied by growing spatial heterogeneity. Its rationalisation by subtle changes in the liquid structure has been long debated but remains elusive, due to intrinsic difficulty in detecting the underlying complex structural ordering. Here we report that structural order parameter characterising local packing capability can well describe the glassy dynamics not only macroscopically but also microscopically, no matter whether it is driven by temperature or density. A Vogel-Fulcher-Tammann (VFT)-like relation is universally identified between the structural relaxation time and the order parameter for supercooled liquids with isotropic interactions. More importantly, we find such an intriguing VFT-like relation to be statistically valid even at a particle level, between spatially coarse-grained structural order and microscopic particle-level dynamics. Such a unified description of glassy dynamics based solely on structural order is expected to contribute to the ultimate understanding of the long-standing glass-transition problem. |
format | Online Article Text |
id | pubmed-6898187 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-68981872019-12-09 Structural order as a genuine control parameter of dynamics in simple glass formers Tong, Hua Tanaka, Hajime Nat Commun Article Glass transition is characterised by drastic dynamical slowing down upon cooling, accompanied by growing spatial heterogeneity. Its rationalisation by subtle changes in the liquid structure has been long debated but remains elusive, due to intrinsic difficulty in detecting the underlying complex structural ordering. Here we report that structural order parameter characterising local packing capability can well describe the glassy dynamics not only macroscopically but also microscopically, no matter whether it is driven by temperature or density. A Vogel-Fulcher-Tammann (VFT)-like relation is universally identified between the structural relaxation time and the order parameter for supercooled liquids with isotropic interactions. More importantly, we find such an intriguing VFT-like relation to be statistically valid even at a particle level, between spatially coarse-grained structural order and microscopic particle-level dynamics. Such a unified description of glassy dynamics based solely on structural order is expected to contribute to the ultimate understanding of the long-standing glass-transition problem. Nature Publishing Group UK 2019-12-06 /pmc/articles/PMC6898187/ /pubmed/31811143 http://dx.doi.org/10.1038/s41467-019-13606-3 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Tong, Hua Tanaka, Hajime Structural order as a genuine control parameter of dynamics in simple glass formers |
title | Structural order as a genuine control parameter of dynamics in simple glass formers |
title_full | Structural order as a genuine control parameter of dynamics in simple glass formers |
title_fullStr | Structural order as a genuine control parameter of dynamics in simple glass formers |
title_full_unstemmed | Structural order as a genuine control parameter of dynamics in simple glass formers |
title_short | Structural order as a genuine control parameter of dynamics in simple glass formers |
title_sort | structural order as a genuine control parameter of dynamics in simple glass formers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6898187/ https://www.ncbi.nlm.nih.gov/pubmed/31811143 http://dx.doi.org/10.1038/s41467-019-13606-3 |
work_keys_str_mv | AT tonghua structuralorderasagenuinecontrolparameterofdynamicsinsimpleglassformers AT tanakahajime structuralorderasagenuinecontrolparameterofdynamicsinsimpleglassformers |