The role of local-geometrical-orders on the growth of dynamic-length-scales in glass-forming liquids
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Date
2018-12-01
Journal Title
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Publisher
Springer Nature
Abstract
The precise nature of complex structural relaxation as well as an explanation for the precipitous growth of relaxation time in cooling glass-forming liquids are essential to the understanding of vitrification of liquids. The dramatic increase of relaxation time is believed to be caused by the growth of one or more correlation lengths, which has received much attention recently. Here, we report a direct link between the growth of a specific local-geometrical-order and an increase of dynamic-length-scale as the atomic dynamics in metallic glass-forming liquids slow down. Although several types of local geometrical-orders are present in these metallic liquids, the growth of icosahedral ordering is found to be directly related to the increase of the dynamic-length-scale. This finding suggests an intriguing scenario that the transient icosahedral connectivity could be the origin of the dynamic-length-scale in metallic glass-forming liquids. © The Author(s) 2018. Open Access - This article is licensed under a Creative Commons Attribution 4.0 International
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Description
This research has been supported by City University Strategic Research Grant, No: 7004695. The authors thank ANSTO for providing beam time on the Pelican instrument at the OPAL reactor.
Keywords
Glass, Liquids, Metallic glasses, Geometry, Cooling, Vitrification
Citation
Wong, K., Krishnan, R. P., Chen, C., Du, Q., Yu, D., Lu, Z., Samwer, K., & Chathoth, S. M. (2018). The role of local-geometrical-orders on the growth of dynamic-length-scales in glass-forming liquids. Scientific Reports, 8(1), 2025. doi:10.1038/s41598-018-20470-6