Skyrmion Signal Reshuffler      


The topologically protected magnetic spin configurations known as skyrmions offer promising applications due to their stability, mobility and localization. In this work, we propose a skyrmion gas-mediated signal reshuffler within the well-established framework of micromagnetics, through which a detailed modelling of the long-range skyrmion-skyrmion interactions paired with their individual thermal diffusion is used to transform a telegraph noise signal into an uncorrelated copy of itself. Our results serve as a proof-of-concept for a compact device inheriting all the scaling and low-energy advantages afforded by the spintronics toolbox. Whereas its immediate application to stochastic computing circuit designs will be made apparent, we argue that its basic functionality, reminiscent of an integrate-and-fire neuron, qualifies it as a novel bio-inspired building block. 


Magnetic skyrmions promise unique opportunities for the processing, storage and transfer of information by means of ultrathin metallic nanostructures at the intersection of both spintronics and nanoelectronics [Fert 2013Nagaosa 2013Sampaio 2013,Iwasaki 2013, Zhang 2015Koshibae 2015].  They appear ubiquitously in diverse systems whenever the competition between Dzyaloshinski-Moriya interaction (DMI) and other magnetic energy contributions result in an equilibrium spin texture that is strongly adverse to deformations. As a result, skyrmions are exceptionally stable structures capable of withstanding room-temperature environments [Jiang 2015Woo 2016] and being manipulated at extremely small current densities ( \(\sim 10^{6}\mathrm{A}/\mathrm{m}^2\)) with negligible ohmic heating as compared to domain walls [