Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 7: Spin-Orbit Interaction at Surfaces I
O 7.5: Vortrag
Montag, 22. März 2010, 12:15–12:30, H38
Tight-binding treatment of Dzyaloshinskii-Moriya interaction on surfaces — •Timo Schena1, Yuriy Mokrousov1, Phivos Mavropoulos1, Cyrille Barreteau2, and Stefan Blügel1 — 1Institut für Festkörperforschung and Institute for Advanced Simulation, Forschungszentrum Jülich, D-52425 Jülich, Germany — 2CEA Saclay, IRAMIS, SPCSI Bat. 462, F-91191 Gif sur Yvette, France
The Dzyaloshinskii-Moriya interaction (DMI) was recently discovered to be important in determining the magnetic properties of thin films and nanostructures. Little is known about the strength and the sign of DMI as function of the chemical composition. We report the development of a self-consistent, parametrized tight-binding code able to treat bulk-systems, films, one-dimensional structures and clusters of high magnetic complexity. It is optimally designed to study the effects arising due to interplay of non-collinear magnetic order, spin-orbit coupling and broken symmetries at surfaces. The self-consistency is based on a simple Stoner model and consideration of the Mulliken-charges of each atom for charge neutrality. To demonstrate the applicability of the developed method we investigate the occurrence of DMI in 3d transition-metal overlayers on substrates of heavy elements.