Regensburg 2013 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 48: Spin-dependent Transport Phenomena

MA 48.2: Vortrag

Freitag, 15. März 2013, 09:45–10:00, H23

Spin-Hall effect in 4d and 5d transition metal systems — •Kristina Chadova, Diemo Ködderitzsch, and Hubert Ebert — Universität München, Department Chemie, Butenandtstr. 5-13, D-81377 München

We present a detailed analysis of different contributions to the extrinsic spin-Hall effect on the basis of first principles calculations. As an example, we consider Cu as a host with 5d impurities of different concentrations. The corresponding calculations are based on the Kubo-Středa equation [1] implemented within the fully relativistic Korringa-Kohn-Rostoker (KKR) Green’s function formalism in combination with the Coherent Potential Approximation (CPA) alloy theory. The decomposition of the extrinsic spin-Hall conductivity is based on the scaling behavior as suggested for the anomalous Hall effect [2]. We discuss the applicability of the latter model by comparing to the full ab initio description. We also analyze the results with respect to a recent model of the extrinsic SHE in these systems [3].

[1] S. Lowitzer, D. Ködderitzsch and H. Ebert, Phys. Rev. Lett. 105, 266604 (2010) [2] N. Nagaosa, J. Sinova, S. Onoda, A. H. MacDonald and N. P. Ong, Rev. Mod. Phys. 82, 1539 (2010) [3] A. Fert and P. M. Levy, Phys. Rev. Lett. 106, 157208 (2011)