Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 15: Magnetism Poster A
MA 15.33: Poster
Dienstag, 2. April 2019, 10:00–13:00, Poster E
Local projection of the intrinsic spin Hall conductivity in heterostructures — •Franziska Töpler1, Tomáš Rauch2, and Ingrid Mertig1,3 — 1Martin Luther University Halle-Wittenberg, Halle, Germany — 2Friedrich-Schiller University Jena, Jena, Germany — 3Max Planck Institute of Microstructure Physics, Halle, Germany
We study the intrinsic contribution to the spin Hall conductivity (SHC) in a system with a magnetic/nonmagnetic interface.
On that account we use an extended unit cell composed of n and m atomic layers of Cu and Co, respectively. The electronic structure is calculated within the tight-binding approach.
We use the Kubo formula to describe the transverse spin current in linear response to an external electric field [1].
To obtain a better understanding of the role of the Cu/Co interface in the spin Hall effect, we derive and test different formulations of the local SHC.
The local projection methods are introduced in analogy to Ref. [2] and Ref. [3] wherein a local marker is used to probe the anomalous Hall effect in inhomogeneous systems.
We compare the results of the different approaches
and discuss there significance with respect to the chosen model system.
[1] Gradhand et al., J. Phys.: Condens. Matter 24, 213202 (2012)
[2] Rauch et al., Phys. Rev. B 98, 115108 (2018)
[3] Marrazzo et al., Phys. Rev. B 95, 121114(R) (2017)