Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 35: Spin Transport and Orbitronics, Spin-Hall Effects I (joint session MA/TT)
MA 35.12: Vortrag
Donnerstag, 21. März 2024, 12:30–12:45, H 2013
Unlocking the Potential of Rare-Earth Dichalcogenides for Topological Spintronics and Orbitronics — Mahmoud Zeer1,2, Dongwook Go1,3, •Peter Schmitz1,2, Tom G. Saunderson3, Wulf Wulfhekel4, Stefan Blügel1,2, and Yuriy Mokrousov1,3 — 1Peter Grünberg Institute and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, Jülich, Germany — 2Department of Physics, RWTH University, Aachen, Germany — 3Institute of Physics, Johannes Gutenberg-University, Mainz, Germany — 4Institute of Quantum Materials and Technologies, Karlsruhe Institute of Technology, Karlsruhe, Germany
We investigate the electronic, magnetic and transport properties of rare-earth dichalcogenides, specifically monolayers of H-phase EuX2 and GdX2 (X = S, Se, Te), using first-principle methods. We show that this family of materials exhibits high magnetic moments, wide bandgaps, and significant anomalous, spin, and orbital Hall conductivities. While the hybridization of p- and f- states in EuX2 occurs just below the Fermi energy, GdX2 displays a non-trivial p-like spin-polarized electronic structure at the Fermi level, which results in manifestly p-based magnetotransport properties. We unravel the role of correlations and strain in influencing the position and hybridization character between the p-, d-, and f-states, which has a direct impact on the quantized Hall response. Our findings suggest that rare-earth dichalcogenides hold promise as a platform for topological spintronics and orbitronics. [1,2] [1] Physical Review Materials 6 (7), 074004 [2] arXiv preprint arXiv:2308.08207.
Keywords: Spin Hall effect; orbital Hall effect; anomlous Hall effect; Rare earth Dichalcogenides