Current-induced H-shaped-skyrmion creation and their dynamics in the helical phase

TL;DR

This paper proposes a method for creating and analyzing the stability and dynamics of skyrmions in helical magnets, which are promising for high-speed racetrack applications due to their confined motion.

Contribution

It introduces a new protocol for topological skyrmion creation in helical backgrounds and studies their stability and current-driven motion under uniaxial anisotropy.

Findings

Successful protocol for skyrmion creation in helical magnets

Skyrmions remain stable under certain current conditions

High-speed skyrmion motion achievable in helical phases

Abstract

Inevitable for the basic principles of skyrmion racetrack-like applications is not only their confined motion along one-dimensional channels but also their controlled creation and annihilation. Helical magnets have been suggested to naturally confine the motion of skyrmions along the tracks formed by the helices, which also allow for high-speed skyrmion motion. We propose a protocol to create topological magnetic structures in a helical background. We furthermore analyse the stability and current-driven motion of the skyrmions in a helical background with in-plane uniaxial anisotropy fixing the orientation of the helices.