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MA: Fachverband Magnetismus

MA 59: Spin Excitations II/ Spin Scattering

MA 59.5: Vortrag

Donnerstag, 17. März 2011, 18:15–18:30, HSZ 04

First-principles calculation of transport through magnetic impurities in metallic wires with strong spin-orbit coupling — •Björn Hardrat¹, Neng-Ping Wang², Frank Freimuth³, Yuriy Mokrousov³, and Stefan Heinze¹ — ¹Institut für Theoretische Physik und Astrophysik, CAU Kiel, Germany — ²Physics Department, Ningbo University, P.R. China — ³Peter Grünberg Institut and Institute for Advanced Simulation, FZ-Jülich and JARA, Germany

We report the application of our recently developed ballistic transport code for one-dimensional magnetic systems to the spin-dependent transmission through magnetic impurities in metal monowires including spin-orbit coupling (SOC). The electronic structure of the considered systems is obtained with the one-dimensional version of the full-potential linearized augmented plane wave (FLAPW) method as implemented in the FLEUR code. We calculate the transmission and conductance within the Landauer formalism using a Greens function approach. In order to apply the Greens function method we map the electronic structure from our FLAPW calculations to a tight-binding like Hamiltonian via Wannier functions, preserving the accurate description of magnetic systems within the FLAPW method for our transport calculations. We demonstrate the potential of our code by calculating the spin-dependent conductance of ferromagnetic Co monowires with a Pt impurity exhibiting strong SOC and Pt monowires with a Co scatterer. We discuss the energy-dependent transmission in terms of the spin-dependent channels and mixing due to SOC leading to the phenomenon of ballistic anisotropic magnetoresistance (BAMR).