Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 28: Magnonics 2
MA 28.13: Vortrag
Donnerstag, 8. September 2022, 12:30–12:45, H43
Electric field control of magnons in magnetic thin films: Ab initio predictions for two-dimensional metallic heterostructures — Alberto Marmodoro1, •Sergiy Mankovsky2, Hubert Ebert2, Jan Minár3, and Ondřej Šipr1,3 — 1Institute of Physics (FZU) of the Czech Academy of Sciences, Prague, Czech Republic — 2Department of Chemistry, Ludwig-Maximilians-University (LMU), Munich, Germany — 3New Technologies Research Centre, University of West Bohemia, Pilsen, Czech Republic
We report on a possible venue to control magnons in 2D heterostructures by an external electric field acting across a dielectric barrier [1]. By performing ab initio 2D TB-KKR calculations for a Fe monolayer and Fe bilayer, both suspended in vacuum and deposited on Cu(001), we demonstrate that external electric field can significantly modify magnon lifetimes and that these changes can be related to field-induced changes in layer-resolved electronic Bloch spectral function. Further changes appear in cases with more than a single magnetic layer, and are strongly dependent on the presence of the substrate.
[1] Phys.Rev. B 105, 174411 (2022)