  We present a detailed analysis of the ion hopping dynamics and the related
nearby oxygen dynamics in a lithium meta silicate glass via molecular dynamics
simulation. For this purpose we have developed numerical techniques to identify
ion hops and to sample and average dynamic information of the particles
involved. This leads to an instructive insight into the microscopic interplay
of ions and network. It turns out that the cooperative dynamics of lithium and
oxygen can be characterized as a sliding door mechanism. It is rationalized why
the local network fluctuations are of utmost importance for the lithium
dynamics.
