SKM 2023 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 29: Neuromorphic Magnetism / Magnetic Logic

MA 29.1: Vortrag

Mittwoch, 29. März 2023, 11:30–11:45, HSZ 02

Brownian Computing Realized Using Skyrmions — •Maarten A. Brems¹, Klaus Raab¹, Grischa Beneke¹, Jan Rothörl¹, Peter Virnau¹, Johan H. Mentik², and Mathias Kläui¹ — ¹Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany — ²Radboud University, Institute for Molecules and Materials, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands

Reservoir computing (RC) has been considered as one of the key computational principles beyond von-Neumann computing. Magnetic skyrmions, topological particle-like spin textures in magnetic films, are particularly promising for implementing RC since they respond strongly nonlinear to external stimuli and feature inherent multiscale dynamics. We propose and experimentally demonstrate a conceptually new approach to skyrmion computing that combines the RC and Brownian computing [1] concepts. By confining the thermal skyrmion motion [2] that can be electrically gated, we find that already a single skyrmion in a confined geometry suffices to realize non-linearly separable functions, which we demonstrate for the XOR gate along with all other Boolean logic gate operations [3]. Our proposed concept ensures low training costs as well as ultra-low power operation and can be readily extended by including more skyrmions in the reservoir, suggesting high potential for scalable and low-energy reservoir computing. [1] M. A. Brems et al., Appl. Phys. Lett. 119, 132405 (2021). [2] J. Zázvorka et al., Nat. Nanotechnol. 14, 658 (2019). [3] K. Raab, M. A. Brems et al., Nat. Commun. 13, 6982 (2022).