Berlin 2012 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 52: Poster II - Magnetic Heusler compounds, Magnetic shape memory alloys, Thin Films, Micro-/Nano-structured magnetic materials, Graphene, Spins in organics, Magnetic imaging, Surface Magnetism, Spin excitations/Torque, Spincaloric transport
MA 52.66: Poster
Freitag, 30. März 2012, 11:00–14:00, Poster A
Extrinsic Spin Nernst effect from first principles — •Katarina Tauber1,2, Martin Gradhand3, Dmitry Fedorov1,2, and Ingrid Mertig1,2 — 1Max-Planck-Institut für Mikrostrukturphysik, Halle, Germany — 2Martin-Luther-Universität Halle-Wittenberg, Halle, Germany — 3H.H. Wills Physics Laboratory, University of Bristol, United Kingdom
Recently, a new field
Spin Caloritronics [1] arose, which relates the spin degree of
freedom to a temperature gradient. Within an ab initio approach we present a study of the spin Nernst effect, which describes the creation of a transversal spin current or spin accumulation due to a longitudinal temperature gradient ∇ T. This effect is similar to the intensively studied spin Hall effect, where instead of ∇ T an electric field is applied. Here we investigate the extrinsic skew scattering mechanism, which is dominant in the limit of dilute concentrations of
substitutional alloys. Our calculations are based on a fully relativistic Korringa-Kohn-Rostoker method
and a solution of the linearized Boltzmann equation. As a first application,
we consider a Cu host with different impurities.
[1] G.E. Bauer, A.H. MacDonald, and S. Maekawa, Solid State Commun. 150, 459 (2010).