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MA: Fachverband Magnetismus
MA 42: Posters Magnetism I
MA 42.38: Poster
Mittwoch, 18. März 2020, 15:00–18:00, P3
Ab initio calculations on Spin Hall Effect for metallic systems — •Alexander Fabian1,2, Michael Czerner1,2, Martin Gradhand3, and Christian Heiliger1,2 — 1Institut für Theoretische Physik, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 16, 35392 Gießen — 2Zentrum für Materialforschung (LaMa), Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 16, 35392 Gießen — 3H.H. Wills Laboratory, University of Bristol, UK
The Spin Hall Effect is a promising effect for use in spintronic devices since it provides a source for spin polarized currents. In order to achieve an efficient conversion of charge current to spin current, different materials have to be investigated. In order to tailor the material properties for efficient usage the properties have to be predicted with a reliable theoretical method. Normally, only the Spin Hall angles and spin conductivities are calculated by theory. On the other hand, optical experiments detect the spin accumulation spatially resolved. In our approach we use a Korringa Kohn Rostoker (KKR) Green’s function method with the Keldysh non-equilibrium formalism to calculate a non-equilibrium density under applied bias. From this density we extract the spin accumulation throughout slabs of metal with strong spin orbit coupling for three different systems: Pt, Cu, U. The results of our approach are compared to the results of another KKR approach using the Boltzmann formalism. The origin of the effect should be only of intrinsic nature since there is no contribution of scattering.