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

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

2004-02-16

arxiv.org/abs/cond-mat/0402427v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.92.255901

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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