Nonzero Skyrmion Hall Effect in Topologically Trivial Structures

It is widely believed that the skyrmion Hall effect, often disruptive for device applications, vanishes for overall topologically trivial structures such as (synthetic) antiferromagnetic skyrmions and skyrmioniums due to a compensation of Magnus forces. In this manuscript, however, we report that in...

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Bibliographic Details
Published in:arXiv.org 2021-10
Main Authors: Msiska, Robin, Rodrigues, Davi R, Leliaert, Jonathan, Everschor-Sitte, Karin
Format: Article
Language:English
Subjects:
Antiferromagnetism
Electromagnetism
Hall effect
Helicity
Hypothetical particles
Particle theory
Torque
Online Access:Get full text
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Summary:It is widely believed that the skyrmion Hall effect, often disruptive for device applications, vanishes for overall topologically trivial structures such as (synthetic) antiferromagnetic skyrmions and skyrmioniums due to a compensation of Magnus forces. In this manuscript, however, we report that in contrast to the case of spin-transfer torque driven skyrmion motion, this notion is generally false for spin-orbit torque driven objects. We show that the skyrmion Hall angle is directly related to their helicity and imposes an unexpected roadblock for developing faster and lower input racetrack memories based on spin-orbit torques.
ISSN:2331-8422
DOI:10.48550/arxiv.2110.07063