Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 15: Magnetism Poster A
MA 15.4: Poster
Dienstag, 2. April 2019, 10:00–13:00, Poster E
Atomistic simulation of electric field assisted writing and deleting of magnetic skyrmions — •Moritz A. Goerzen1, Stephan v. Malottki1, Pavel F. Bessarab2, and Stefan Heinze1 — 1Institute of Theoretical Physics and Astrophysics, University of Kiel — 2School of Engineering and Natural Sciences - Science Institute, University of Iceland
Future magnetic skyrmion technologies require a high degree of control of writing and deleting processes. While first experimental results demonstrate, that skyrmions can be nucleated and annihilated at will by varying electric field of a scanning-tunneling microscope tip [1], a theoretical understanding of the underlying effects is still missing. We attempt to clarify the role of the electric field in skyrmion creation and annihilation processes by means of atomistic spin dynamics simulations, minimum energy path calculations, transition state theory and density functional theory [2]. The influence of the electric field is modeled within linear response approximation to the surface magneto-electric effect and Rashba effect. We systematically study how the ground state and skyrmion stabilities are influenced by this parameter change caused by the electric field in Pd/Fe/Ir(111) system.
Hsu et al., Nat. Nano. 12, 123 (2017)
Haldar et al., Phys. Rev. B 98, 060413 (2018)