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Dresden 2011 – scientific programme

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MA: Fachverband Magnetismus

MA 63: Poster II (Surface Magnetism/ Magnetic Imaging/ Topological Insulators/ Spin Structures and Magnetic Phase Transitions/ Graphene/ Magnetic Thin Films/ Magnetic Semiconductors/ Magnetic Half-metals and Oxides/ Spin-dependent Transport/ Spin Excitations and Spin Torque/ Spin Injection and Spin Currents in Heterostructures/ Spintronics/ Magnetic Storage and Applications)

MA 63.95: Poster

Friday, March 18, 2011, 11:00–14:00, P2

Extrinsic Spin Hall Effect in Metallic Slab Systems — •Christian Herschbach1, Martin Gradhand2, Dmitry V. Fedorov1, Peter Zahn1, and Ingrid Mertig1,21Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle, Germany — 2Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany

After the first measurement of the gigantic spin Hall effect (SHE) in Au [1], a discussion about the responsible mechanism has been started [2-3]. Recently, a new experiment with Pt-doped Au films [4] showed a large spin Hall angle (SHA) as was reported before in Ref. [1].

Here we present ab initio calculations in order to describe the skew scattering mechanism of the spin Hall effect in free-standing Au slabs of different thicknesses. The computation is based on a fully relativistic Korringa-Kohn-Rostoker Green’s function method [1]. The dependence of the SHA on the position of the substitutional Pt impurities in the slab is investigated.

[1] T. Seki et al., Nature Mater. 7, 125 (2008)

[2] G. Guo et al., PRL 102, 036401 (2009)

[3] M. Gradhand et al., PRL 104, 186403 (2010)

[4] B. Gu et al., PRL 105, 216401 (2010)

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