Domain Wall Skyrmions in Chiral Magnets

Calum Ross, Muneto Nitta

Research output: Contribution to journalArticle (journal)peer-review

11 Citations (Scopus)
9 Downloads (Pure)

Abstract

Domain-wall skyrmions are skyrmions trapped inside a domain wall. We investigate domain-wall skyrmions in chiral magnets using a fully analytic approach. Treating the Dzyaloshinskii-Moriya (DM) interaction perturbatively, we construct the low-energy effective theory of a magnetic domain wall in an O(3) sigma model with the DM interaction and an easy-axis potential term, yielding a sine-Gordon model. We then construct domain-wall skyrmions as sine-Gordon solitons along the domain wall. We also construct domain-wall skyrmions on top of a pair of a domain wall and an anti-domain wall. One characteristic feature of domain-wall skyrmions is that both skyrmions and antiskyrmions are equally stable inside the domain wall, unlike the bulk in which only one of them is stable.

Original languageEnglish
Article number024422
Pages (from-to)1-19
JournalPhysical Review B
Volume107
Issue number2
Early online date25 Jan 2023
DOIs
Publication statusPublished - 25 Jan 2023

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