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Issue 33, 2017
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A structural signature of the breakdown of the Stokes–Einstein relation in metallic liquids

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Abstract

The breakdown of the Stokes–Einstein relation (SER) in three model metallic liquids is investigated via molecular dynamics simulations. It is found that the breakdown of SER is closely correlated with the clustering behavior of well-packed atoms. When the SER breaks down, many cluster properties have almost the same value in these metallic liquids. At the breakdown temperature of SER, the temperature dependence of the number of clusters begins to deviate from a linear increase and the average number of well-packed atoms in the clusters reaches about 2, which indicates an increase in structure heterogeneity. Moreover, the size of the largest cluster shows a direct correlation with the SER. Therefore, our study provides a possible structural origin for the breakdown of SER in metallic liquids.

Graphical abstract: A structural signature of the breakdown of the Stokes–Einstein relation in metallic liquids

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Publication details

The article was received on 23 May 2017, accepted on 27 Jul 2017 and first published on 27 Jul 2017


Article type: Paper
DOI: 10.1039/C7CP03475J
Citation: Phys. Chem. Chem. Phys., 2017,19, 22094-22098
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    A structural signature of the breakdown of the Stokes–Einstein relation in metallic liquids

    S. Pan, S. Feng, J. Qiao, X. Niu, W. Wang and J. Qin, Phys. Chem. Chem. Phys., 2017, 19, 22094
    DOI: 10.1039/C7CP03475J

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