Abstract
AbstractA quasielastic neutron scattering experiment has been performed on a single crystalline sample of the fast ionic conductor rubidium silver iodide (RbAg4I5) in order to study the dynamics of the mobile silver ions in this material. The corrected spectra show broad quasielastic components whose weight increases with increasing momentum transfer in the elastic Q‐range from 1.0 to 1.8 Å−1. The quasielastic broadening is explained by the frequent occurrence of so‐called forward‐backward hopping sequences of the silver ions which are key steps of jump relaxation. A calculation based on the jump relaxation model yields a normalized frequency spectrum of the silver hopping motion that simultaneously fits the dynamic structure factor and the dynamic conductivity spectra of this material.
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