Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 39: Poster Magnetism II
MA 39.2: Poster
Mittwoch, 11. März 2026, 18:00–21:00, P2
Transport and spin torque in van der Waals heterostructures — •Nils Stüber1, Sadeed Hameed1, Aditya Kumar1, Xinran Wang1, Durgesh Kumar1, Aravind Puthirath Balan1, and Mathias Kläui1,2 — 1Institute of Physics, Johannes Gutenberg-Universität, Mainz, Germany — 2Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, Trondheim, Norway
Graphene serves as an ideal spin-transport channel due to its long spin relaxation times and possible near-ballistic transport. In Ni/Gr heterostructures, the strength of the Spin Hall effect can be tuned via gate voltage, enabled by the Dirac-cone band structure.
In this work, we investigate spin-current generation in graphene induced by proximity-driven spin-orbit coupling (SOC) from epitaxially grown Ni(111). The SOC arises from hybridization between the graphene*s π-electrons and the Ni 3d orbitals.
We perform spin-torque ferromagnetic resonance (ST-FMR) to study the dependence of the spin-current signal on the Ni thickness and to identify the origin of the generated spin current. Additionally, THz emission experiments were carried out to detect the inverse Spin Hall effect in graphene, revealing a significantly different signal compared to CoFe/Gr heterostructures.
Keywords: Graphene; Rashba effect; spin torque; ST-FMR; THz measurements