title: Asymmetric spin-wave dispersion on Fe(110): direct evidence of the Dzyaloshinskii-Moriya interaction.
abstract: The influence of the Dzyaloshinskii-Moriya interaction on the spin-wave dispersion in an Fe double layer grown on W(110) is measured for the first time. It is demonstrated that the Dzyaloshinskii-Moriya interaction breaks the degeneracy of spin waves and leads to an asymmetric spin-wave dispersion relation. An extended Heisenberg spin Hamiltonian is employed to obtain the longitudinal component of the Dzyaloshinskii-Moriya vectors from the experimentally measured energy asymmetry.
authors.affiliation: Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany. zakeri@mpi-halle.de
authors.forename: Kh
authors.initials: Kh
authors.lastname: Zakeri
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.forename: J
authors.initials: J
authors.lastname: Prokop
authors.forename: T-H
authors.initials: TH
authors.lastname: Chuang
authors.forename: N
authors.initials: N
authors.lastname: Sakr
authors.forename: W X
authors.initials: WX
authors.lastname: Tang
authors.forename: J
authors.initials: J
authors.lastname: Kirschner