SKM 2021 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 14: Focus Session: Higher-Order Magnetic Interactions - Implications in 2D and 3D Magnetism II
MA 14.6: Vortrag
Donnerstag, 30. September 2021, 15:00–15:15, H5
Chiral multi-site interactions in prototypical magnetic systems — •Sascha Brinker1, Manuel dos Santos Dias1, and Samir Lounis1,2 — 1Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany — 2Faculty of Physics, University of Duisburg-Essen and CENIDE, 47053 Duisburg, Germany
Atomistic spin models can successfully explain the properties of magnetic materials once the relevant magnetic interactions are identified. Recently, new types of chiral interactions that generalize the Dzyaloshinskii-Moriya interaction have been proposed [1,2,3,4]. Here, we present a systematic construction of a generalized spin model containing isotropic and chiral multi-site interactions, motivated by a microscopic model, and their symmetry properties are established. We show that the chiral interactions arise solely from the spin-orbit interaction and that the multi-site interactions do not have to follow Moriya’s rules, unlike the Dzyaloshinskii-Moriya interaction [1,4]. We then report on density functional theory calculations for prototypical magnetic systems, finite magnetic nanostructures on heavy metal substrates and two-dimensional systems with inversion symmetry.
[1] S. Brinker, M. dos Santos Dias and S. Lounis, New J Phys 21, 083015 (2019); [2] A. Lászlóffy et al., Phys Rev B 99, 184430 (2019); [3] S. Grytsiuk et al., Nat Commun 11, 511 (2020); [4] S. Brinker, M. dos Santos Dias and S. Lounis, Phys Rev Research 2, 033240 (2020)
–Work funded by Horizon 2020–ERC (CoG 681405–DYNASORE).