Current-current correlations inα−AgI

Molecular-dynamics results are presented for the current-current correlation function $\phi \mathrm{}\left(t\right)\mathrm{}$. The time behavior of $\phi \mathrm{}\left(t\right)\mathrm{}$ indicates that there are relatively long-lived correlations between the velocities of pairs of ions in $\alpha -\mathrm{AgI}$.