Sat, 26 Jul 2008 17:14:26 BST CiteULike: dchen collaboration http://www.citeulike.org/user/dchen/tag/collaboration CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/782016 <i>Physical Review Letters, Vol. 92, No. 25. (2004)</i><br /><br />We perform molecular dynamics simulations to study the structural relaxation dynamics of a model of viscous silica, the prototype of a strong glass former. We find that the melt dynamics are spatially heterogeneous regardless of whether the bulk relaxation is non-Arrhenius or Arrhenius, and cannot be understood as a statistical bondbreaking process. Further, we show that stringlike motion is suppressed by the covalent bondings, yet high particle mobility propagates continuously, supporting the concept of dynamic facilitation emphasized in recent theoretical work. Spatially Heterogeneous Dynamics and Dynamic Facilitation in a Model of Viscous Silica Michael Vogel Sharon Glotzer doi:10.1103/PhysRevLett.92.255901 Physical Review Letters, Vol. 92, No. 25. (2004) 2006-08-01T23:05:33-00:00 2004 Physical Review Letters 92 25 APS cluster collaboration people simulation