Berlin 2015 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 39: Spin-dependent Transport Phenomena I
MA 39.4: Vortrag
Donnerstag, 19. März 2015, 10:15–10:30, H 0112
Separation of different contributions to the spin Hall effect in dilute alloys based on the Kubo-Středa approach — •Kristina Chadova1, Dmitry Fedorov2,3, Christian Herschbach2, Martin Gradhand4, Ingrid Mertig2,3, Diemo Ködderitzsch1, and Hubert Ebert1 — 1Department of Chemistry, Physical Chemistry, Ludwig-Maximilians University Munich, Germany — 2Institute of Physics, Martin-Luther University Halle-Weinberg, 06099 Halle, Germany — 3Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany — 4H.H. Wills Physics Laboratory, University of Bristol, Bristol BS8 1TL, United Kingdom
In recent years several first-principles approaches have been established to describe transverse electron transport phenomena as e.g. the anomalous Hall and spin Hall effects. Starting from an earlier decomposition scheme [1] we extract the coherent part of the SHC as well as the extrinsic vertex-correction (vc) based skew-scattering and the side jump (sj) contributions. Further using insight from Boltzmann transport theory we separate the sj into a sum of a term being exclusively caused by the vc and a term that does not depend on the vc. The proposed procedure was applied within first-principles fully relativistic KKR transport framework (Kubo-Středa) to dilute alloys based on Cu, Au and Pt hosts [2].
[1] S Lowitzer, D Ködderitzsch, H Ebert, PRL 105, 266604 (2010)
[2] K Chadova, D Fedorov, C Herschbach, M Gradhand, I Mertig, D Ködderitzsch, H Ebert (to be published)