Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions

TL;DR

This paper demonstrates the manipulation of magnetic skyrmions, including conversion, duplication, merging, and their use in designing spin logic gates like AND and OR, advancing skyrmion-based spintronic devices.

Contribution

It introduces methods for converting, duplicating, and merging skyrmions with different topologies and designs skyrmion-based logic gates, expanding potential spintronic applications.

Findings

Skyrmion conversion, duplication, and merging are feasible within one system.

Conversion of skyrmions into bimerons demonstrated.

Designed skyrmion-based AND and OR logic gates.

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.