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Configuration correlation governs slow dynamics of supercooled metallic liquids [Physics]

The search for a structural origin governing the dynamical slowing down of a supercooled liquid toward glass transition is an active area of the community of amorphous materials. In the past decade, the locally preferred geometrical orderings, that is, those local polyhedral packing clusters extracted from instantaneous atomic configurations, such as icosahedron, have been suggested as the structural origin of slow dynamics in metallic glass-forming liquids. Here, we demonstrate that it is the intrinsic correlation between configurations that captures the structural origin governing slow dynamics. A correlation length extracted from these configurations' correlation plays a more important role than various dynamic correlation lengths in determining the drastic dynamical slowdown of supercooled metallic liquids.

Authors:   Yuan-Chao Hu; Yan-Wei Li; Yong Yang; Peng-Fei Guan; Hai-Yang Bai; Wei-Hua Wang
Journal:   Proceedings of the National Academy of Sciences current issue
Volume:   115
edition:   25
Year:   2018
Pages:   6375
DOI:   10.1073/pnas.1802300115
Publication date:   19-Jun-2018
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