Some Finite Size Effects in Simulations of Glass Dynamics

Details Some Finite Size Effects in Simulations of Glass Dynamics Some Finite Size Effects in Simulations of Glass Dynamics

1996-10-08

arxiv.org/abs/cond-mat/9610066v1

Phys. Rev. E 54, R5897 (1996)

Physics

Condensed Matter

Statistical Mechanics

12 pages of RevTex, 4 postscript figures available from W. Kob

Scientific paper

10.1103/PhysRevE.54.R5897

We present the results of a molecular dynamics computer simulation in which we investigate the dynamics of silica. By considering different system sizes, we show that in simulations of the dynamics of this strong glass former surprisingly large finite size effects are present. In particular we demonstrate that the relaxation times of the incoherent intermediate scattering function and the time dependence of the mean squared displacement are affected by such finite size effects. By compressing the system to high densities, we transform it to a fragile glass former and find that for that system these types of finite size effects are much weaker.

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