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MA: Fachverband Magnetismus
MA 29: Spin-Dependent Phenomena in 2 D
MA 29.4: Vortrag
Mittwoch, 20. März 2024, 15:45–16:00, EB 202
Electrical engineering of topological magnetism in two-dimensional heterobilayers — •Nihad Abuawwad1,2, Manuel dos Santos Dias3, and Samir Lounis1,2 — 1Peter Grünberg Institute (PGI), FZJ, 52425 Jülich, Germany — 2Faculty of Physics, University of Duisburg-Essen, 47053 Duisburg, Germany — 3Scientific Computing Department, STFC Daresbury Laboratory, Warrington WA4 4AD, United Kingdom
The emergence of topological magnetism in 2D van der Waals (vdW) materials has made 2D heterostructures vital for advanced information technology devices.
Here, we show from first-principles calculations in combination with atomistic spin models that an external electric field modifies the vdW gap between CrTe2 and (Rh, Ti)Te2 layers and alters the underlying magnetic interactions. We demonstrate the all-electric switching of the topological nature of individual topological magnetic objects emerging in 2D vdW heterobilayers.
The electric field enables switching between ferromagnetic skyrmions and meron pairs in the CrTe2/RhTe2 heterobilayer while it enhances the stability of frustrated antiferromagnetic merons in the CrTe2/TiTe2 heterobilayer.
This discovery opens possibilities for energy-efficient information storage and transmission in spintronics [1,2,3].
–Work funded by the Palestinian-German Science Bridge (BMBF–01DH16027), and SPP 2244 (project LO 1659/7-1).
[1] arXiv:2311.01294, (2023). [2] Phys.Rev.B 108,094409 (2023). [3] J. Phys.: Condens. Matter 34 454001 (2022).
Keywords: Topological magnetism; 2D heterostructures; Skyrmions; merons