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MA: Fachverband Magnetismus

MA 55: Poster II

MA 55.87: Poster

Freitag, 4. April 2014, 10:30–13:30, P2

Dzyaloshinskii-Moriya interaction in the Kondo lattice model — •Kathrin Höfner and Wolfgang Nolting — Institut für Physik, Humboldt-Universität zu Berlin, Germany

In the recent years much research has been focused on magnetic systems with low symmetry or low dimensionality that exhibit interesting non-collinear spin structures.

A popular explanation for these structures is the Dzyaloshinskii-Moriya (DM) interaction, an effective anisotropic and antisymmetric coupling between localized spins. While successful in describing the magnetic properties of various systems, the justification of the interaction itself depends on the specific electronic structure of the considered material.

We therefore relate the DM-interaction to the electronic structure of a multi-band Kondo lattice model. The RKKY formalism is generalized to allow the inclusion of spin-orbit coupling in a non-perturbative manner. We show that this procedure leads to Heisenberg-, Ising-, and Dzyaloshinskii-Moriya-like terms. The obtained exchange integrals and the resulting magnetic structure are discussed.