Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions
TL;DR: In this article, the conversion, duplication and merging of isolated skyrmions with different chirality and topology are demonstrated all in one system, and they also demonstrate the conversion of another form of a Skyrmion into another form, i.e., a bimeron.
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Abstract: Magnetic skyrmions, which are topological particle-like excitations in ferromagnets, have attracted a lot of attention recently. Skyrmionics is an attempt to use magnetic skyrmions as information carriers in next generation spintronic devices. Proposals of manipulations and operations of skyrmions are highly desired. Here, we show that the conversion, duplication and merging of isolated skyrmions with different chirality and topology are possible all in one system. We also demonstrate the conversion of a skyrmion into another form of a skyrmion, i.e., a bimeron. We design spin logic gates such as the AND and OR gates based on manipulations of skyrmions. These results provide important guidelines for utilizing the topology of nanoscale spin textures as information carriers in novel magnetic sensors and spin logic devices.
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Citations
Direct current-tunable MHz to multi-GHz skyrmion generation and control
TL;DR: By using domain pinning and current-driven skyrmion motion, this work demonstrates a highly tunable and DC-controlled skyrMion signal source, which pave the way towards ultra wideband, compact and integrated skyr mionic circuits.
Giant tunability of microwave responses for current-driven skyrmions in a tapered nanostructure with notches
TL;DR: In this article , the authors investigated the motion and microwave resonant dynamics of skyrmions in an engineered nanostructure using micromagnetic simulations, where a remarkable tunability of 6 GHz is observed between the initial and the final state.
Molecular beam epitaxy growth of [CrGe/MnGe/FeGe] superlattices: toward artificial B20 skyrmion materials with tunable interactions
TL;DR: In this paper, the growth of single crystal thin films of FeGe, MnGe, and CrGe on Si(1 1/1/1) substrates is described.
The inner topological structure and defect control of magnetic skyrmions
Ji-Rong Ren,Zhong-Xi Yu +1 more
TL;DR: In this paper, the integrand of magnetic skyrmions can be expressed as curvature tensor of Wu-Yang potential, and the inner topological structure expression of skyrms with Hopf index and Brouwer degree is obtained.
Skyrmion lifetime in ultrathin films
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TL;DR: In this article, the authors show that thermal stability of skyrmions due to entropic effects can be strongly affected by external control parameters such as magnetic field and interface composition.
References
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