Incoherent Scattering Functions of Hopping Particles in Random Lattices

Abstract

The incoherent scattering functions of hopping particles in random systems are theoretically examined in terms of the relaxation mode theory, focusing on the intermediate scattering function and dynamical structure factor. In the former, we discuss how it correlates with the diffusion coefficients in the small q approximation, which reflect the anomalous behavior of the nondiffusive modes. While in the latter, the non-BPP spin–lattice relaxation is investigated where the mechanism is explained by the contribution of the diffusive and extended nondiffusive relaxation modes.