SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 21: Spin-Dependent Phenomena in 2D
MA 21.3: Vortrag
Dienstag, 28. März 2023, 15:30–15:45, HSZ 403
Spin-texture of graphene on Co films on heavy metals — •Donya Mazhjoo1,2, Gustav Bihlmayer1, and Stefan Blügel1 — 1Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany — 2Physics Department, RWTH-Aachen University, 52062 Aachen, Germany
Graphene(Gr) covered ferromagnetic films deposited on heavy metals (HM) have been proposed for the exploration of novel spin-orbitronic devices since they possess a perpendicular magnetic anisotropy (MA) as well as a sizable Dzyaloshinskii-Moriya interaction (DMI). By using density functional theory as implemented in the Fleur-code [1], we investigate the spin-orbit (SO) induced spin-texture of Gr covered Co/Ir(111) heterostructures. We consider SOC in first order perturbation theory to study the DMI and self-consistently for the MA energy. Various thicknesses of Co are investigated and compared to experimental data. There, for thin Co films, spin- and angular-resolved photoemission spectroscopy found an in-plane spin-polarization of the Gr π bands, consistent with a HM induced Rashba-type SO coupling at the Gr/Co interface [2]. We compare to Pt(111) as HM substrate looking for signatures of the DMI in the (induced) spin-textures.
Support from the FLAG-ERA JTC 2019 grant SOgraphMEM is gratefully acknowledged.
[1] https://www.flapw.de
[2] B. Cano et al. arXiv:2206.04351