Spin waves at surfaces and interfaces in cubic Heisenberg systems

Publisher Website
Google Scholar
Abstract
The effects of the underlying crystal structure and the surface or interface normal on spin waves at surfaces and interfaces are examined for cubic crystals described by the Heisenberg Hamiltonian. For surfaces, cleavage and the Goldstone rule by themselves generally favor the formation of surface states. Interface states occur in nearly every case studied in simple model bicrystals. With the same perturbations, there are pronounced differences in the results obtained for different faces of the same crystal, or in those for the same face of different crystals.