The Study of Dynamics Heterogeneity in SiO2 Liquid

Abstract

A molecular dynamics simulation has been carried out to investigate the dynamics heterogeneity of SiO2 liquid at 2600 Kelvin and ambient pressure. We indicate that the diffusion in the liquid is realized by the rate of effective reaction, SiOx→SiOx’ and OSiy→OSiy’. Moreover, the reactions are non-uniform: they are spatially clustered. In addition, we found the clustering from different sets of atoms specified by the mobility of atom or frequency of reactions. Also, results show that the clustering becomes more pronounced at ambient pressure. This evidences the dynamic heterogeneity in the SiO2 liquid.