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Spatially heterogeneous dynamics and dynamic facilitation in a model of viscous silica

Michael Vogel·Sharon C. Glotzer
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Abstract

Performing molecular dynamics simulations, we find that the structural relaxation dynamics of viscous silica, the prototype of a strong glass former, are spatially heterogeneous and cannot be understood as a statistical bond breaking process. Further, we show that high particle mobility predominantly propagates continuously through the melt, supporting the concept of dynamic facilitation emphasized in recent theoretical work.

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Michael Vogel, Sharon C. Glotzer. 2004-02-16. Spatially heterogeneous dynamics and dynamic facilitation in a model of viscous silica. https://doi.org/10.1103/physrevlett.92.255901

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