Quasi-elastic scattering in fast-ion conducting SrCl2: a molecular dynamics study

The authors have used molecular dynamics simulation to study the central peak recently discovered by quasi-elastic neutron scattering on SrCl 2 in the fast ion conducting state. They find that the peak appears as a component of the simulated partial dynamical structure factors. They find, in agreement with experiment, that this peak is present above the fast ion transition temperature but absent below it. The simulations also reproduce the experimental facts that the intensity of the peak is strongly dependent on wave vector and that its frequency width is almost independent of wavevector.