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Authors: Brems, Maarten A.
Kläui, Mathias
Virnau, Peter
Title: Circuits and excitations to enable Brownian token-based computing with skyrmions
Online publication date: 17-Mar-2022
Year of first publication: 2021
Language: english
Abstract: Brownian computing exploits thermal motion of discrete signal carriers (tokens) for computations. In this paper, we address two major challenges that hinder competitive realizations of circuits and applications of Brownian token-based computing in actual devices, for instance, based on magnetic skyrmions. To overcome the problem that crossings generate for the fabrication of circuits, we design a crossing-free layout for a composite half-adder module. This layout greatly simplifies experimental implementations as wire crossings are effectively avoided. Additionally, our design is shorter to speed up computations compared to conventional designs. To address the key issue of slow computation based on thermal excitations, we propose to overlay artificial diffusion induced by an external excitation mechanism. For instance, if magnetic skyrmions are used as tokens, artificially induced diffusion by spin-orbit torques or other mechanisms increases the speed of computations by several orders of magnitude. Combined with conventional Brownian computing, the latter could greatly enhance the application scenarios of token-based computing, for example, for low power devices such as autonomous sensors with limited power that is harvested from the environment.
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: In Copyright
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Journal: Applied physics letters
Pages or article number: 132405
Publisher: American Institute of Physics
Publisher place: Melville, NY
Issue date: 2021
ISSN: 1077-3118
Publisher DOI: 10.1063/5.0063584
Appears in collections:JGU-Publikationen

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