Spin and orbital transport in rare-earth dichalcogenides: The case of EuS2

Mahmoud Zeer, Dongwook Go, Johanna P. Carbone, Tom G. Saunderson, Matthias Redies, Mathias Kläui, Jamal Ghabboun, Wulf Wulfhekel, Stefan Blügel, and Yuriy Mokrousov
Phys. Rev. Materials 6, 074004 – Published 7 July 2022

Abstract

We perform first-principles calculations to determine the electronic, magnetic, and transport properties of rare-earth dichalcogenides, taking a monolayer of H-phase EuS2 as a representative. We predict that the H phase of the EuS2 monolayer exhibits a half-metallic behavior upon doping with a very high magnetic moment. We find that the electronic structure of EuS2 is very sensitive to the value of Coulomb repulsion U, which effectively controls the degree of hybridization between Eu f and S p states. We further predict that the nontrivial electronic structure of EuS2 directly results in a pronounced anomalous Hall effect with nontrivial band topology. Moreover, while we find that the spin Hall effect closely follows the anomalous Hall effect in the system, the orbital complexity of the system results in a very large orbital Hall effect, whose properties depend very sensitively on the strength of correlations. Our findings thus promote rare-earth-based dichalcogenides as a promising platform for topological spintronics and orbitronics.

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  • Received 1 February 2022
  • Revised 10 June 2022
  • Accepted 17 June 2022

DOI:https://doi.org/10.1103/PhysRevMaterials.6.074004

©2022 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Mahmoud Zeer1,2,*, Dongwook Go1,3,†, Johanna P. Carbone1,2, Tom G. Saunderson3, Matthias Redies1,2, Mathias Kläui3, Jamal Ghabboun4, Wulf Wulfhekel5, Stefan Blügel1, and Yuriy Mokrousov1,3,‡

  • 1Peter Grünberg Institute and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany
  • 2Department of Physics, RWTH Aachen University, 52056 Aachen, Germany
  • 3Institute of Physics, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
  • 4Department of Physics, Bethlehem University, Bethlehem, Palestine
  • 5Physikalisches Institut, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany

  • *m.zeer@fz-juelich.de
  • d.go@fz-juelich.de
  • y.mokrousov@fz-juelich.de

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Issue

Vol. 6, Iss. 7 — July 2022

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