Berlin 2015 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 20: POSTER Ib
MA 20.35: Poster
Dienstag, 17. März 2015, 09:30–13:00, Poster A
Towards a straightforward semiclassical ab initio description of the side-jump mechanism in the SHE — •Christian Herschbach1,2, Dmitry Fedorov2,1, Martin Gradhand3, and Ingrid Mertig1,2 — 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany — 2Max-Planck-Institut für Mikrostrukturphysik, Halle, Germany — 3H. H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
The investigations of the spin Hall effect rely on the separation between intrinsic and extrinsic contributions, where the latter ones imply the skew-scattering and side-jump mechanisms. While the first-principles description of the skew scattering was already successfully implemented [1], a corresponding semiclassical approach for the side-jump mechanism is still missing.
We present a first step into this direction by considering two different simplified approaches. The first one follows a suggestion of Sinitsyn et al. [2] focussing on the host properties expressed in terms of the Berry curvature, which is calculated from first principles [3]. The second approach puts the emphasis on the properties of the impurities by extending the resonant scattering model [4] similarly to the case of skew scattering [5]. Here, the required scattering phase shifts are obtained by means of ab initio calculations.
[1] M. Gradhand et al., PRL 104, 186403 (2010); [2] N.A. Sinitsyn et al., PRB 73, 075318 (2006); [3] M. Gradhand et al., PRB 84, 075113 (2011); [4] A. Fert and P.M. Levy, PRL 106, 157208 (2011); [5] D.V. Fedorov et al., PRB 88, 085116 (2013).