Relaxation dynamics of a viscous silica melt: The intermediate scattering functions
Relaxation dynamics of a viscous silica melt: The intermediate scattering functions
We use molecular dynamics computer simulations to study the relaxation dynamics of a viscous melt of silica. The coherent and incoherent intermediate scattering functions, F(q,t) and F(s)(q,t), show a crossover from a nearly exponential decay at high temperatures to a two-step relaxation at low temperatures. Close to the critical temperature …