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MA: Fachverband Magnetismus

MA 59: Spin Excitations II/ Spin Scattering

MA 59.2: Vortrag

Donnerstag, 17. März 2011, 17:30–17:45, HSZ 04

Anisotropic Spin Hall Effect from First Principles — •Frank Freimuth, Stefan Blügel, and Yuriy Mokrousov — Peter Grünberg Institut & Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany

We present first-principles calculations [1] of the intrinsic non-dissipative spin Hall conductivity (SHC) for 3d, 4d and 5d transition metals focusing in particular on the anisotropy of the SHC in nonmagnetic hcp metals and in antiferromagnetic bulk Cr. For the metals of this study we generally find large anisotropies. We derive a general relation between the SHC vector and the direction of spin-polarization and discuss the consequences for hcp metals. Especially, it is predicted that for systems, where the SHC changes sign due to the anisotropy, the spin Hall effect may be tuned such that the spin polarization is parallel either to the electric field or to the spin current. Additionally, we describe our computational method [2,3] emphasizing the Wannier interpolation technique and the definition of the conserved spin current. This work is supported by the HGF-YIG grant VH-NG-513.

[1] e-print: http://arxiv.org/abs/1011.2714

[2] F. Freimuth et al. Phys. Rev. B 78, 035120 (2008)

[3] www.flapw.de