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HL: Fachverband Halbleiterphysik
HL 14: 2D Materials and their Heterostructures II (joint session DS/HL)
HL 14.11: Vortrag
Dienstag, 18. März 2025, 12:45–13:00, H3
Self spin-orbit torque in proximitized graphene on 1T-TaS2 monolayer — •Martin Gmitra1,4, Maedeh Rassekh1, Juraj Mnich1, and Marko Milivojević2,3 — 1Institute of Physics, P.J.Šafárik University in Košice, 04001 Košice, Slovakia — 2Faculty of Physics, University of Belgrade, 11001 Belgrade, Serbia — 3Institute of Informatics, SAS, 84507 Bratislava, Slovakia — 4Institute of Experimental Physics, SAS, 04001 Košice, Slovakia
We show that self spin-orbit torque induced in graphene-based van der Waals heterostructures represents a platform to extract the Rashba phase – a proximity-induced spin-orbit coupling parameter. Performing first-principles calculations, tight-binding modeling, and non-equilibrium Greens function transport calculations for graphene on 1T-TaS2 monolayer we found that charge current in graphene generates non-equilibrium spin accumulation and self-torque in graphene due to the proximity-induced spin-orbit coupling and exchange interaction. The Rashba spin-orbit torque is a dominant contribution and weakly depends on the direction of magnetization in 1T-TaS2. We propose that the magneto-optical Kerr effect can directly extract the Rashba spin-orbit coupling phase.
This work was supported by the APVV-SK-CZ-RD-21-0114, EU NextGenerationEU through the Recovery and Resilience Plan for Slovakia under the project No. 09I03-03-V05-00008, and IMPULZ IM-2021-42.
Keywords: spin-orbit torque; proximity effect; graphene; spintronics