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Authors: Song, Chengkun
Kerber, Nico
Rothörl, Jan
Ge, Yuqing
Raab, Klaus
Seng, Boris
Brems, Maarten A.
Dittrich, Florian
Reeve, Robert M.
Wang, Jianbo
Liu, Qingfang
Virnau, Peter
Kläui, Mathias
Title: Commensurability between element symmetry and the number of skyrmions governing skyrmion diffusion in confined geometries
Online publication date: 2-Jun-2021
Year of first publication: 2021
Language: english
Abstract: Magnetic skyrmions are topological magnetic structures, which exhibit quasi-particle properties and can show enhanced stability against perturbation from thermal noise. Recently, thermal Brownian diffusion of these quasi-particles has been found in continuous films, and unconventional computing applications have received significant attention, requiring structured elements. Thus, as the next necessary step, skyrmion diffusion in confined geometries is studied, and it is found to be qualitatively different: The diffusion is governed by the interplay between the total number of skyrmions and the structure geometry. In particular, the effect of circular and triangular geometrical confinement is ascertained. It is found that for triangular geometries, the behavior is drastically different for the cases when the number of skyrmions in the element is either commensurate or incommensurate with a symmetric filling of the element. This influence of commensurability is corroborated by simulations of a quasi-particle model.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
Version: Published version
Publication type: Zeitschriftenaufsatz
Document type specification: Scientific article
License: CC BY-NC-ND
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Journal: Advanced functional materials
Pages or article number: 2010739
Publisher: Wiley-VCH
Publisher place: Weinheim
Issue date: 2021
ISSN: 1616-301X
Publisher URL:
Publisher DOI: 10.1002/adfm.202010739
Appears in collections:JGU-Publikationen

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