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TT: Fachverband Tiefe Temperaturen

TT 64: Spin Transport and Orbitronics, Spin-Hall Effects I (joint session MA/TT)

TT 64.12: Talk

Thursday, March 21, 2024, 12:30–12:45, H 2013

Unlocking the Potential of Rare-Earth Dichalcogenides for Topological Spintronics and OrbitronicsMahmoud Zeer1,2, Dongwook Go1,3, •Peter Schmitz1,2, Tom G. Saunderson3, Wulf Wulfhekel4, Stefan Blügel1,2, and Yuriy Mokrousov1,31Peter 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

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