Ross, Calum;
Nitta, Muneto;
(2023)
Domain-wall skyrmions in chiral magnets.
Physical Review B
, 107
(2)
, Article 024422. 10.1103/physrevb.107.024422.
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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.
| Type: | Article |
|---|---|
| Title: | Domain-wall skyrmions in chiral magnets |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/physrevb.107.024422 |
| Publisher version: | https://doi.org/10.1103/physrevb.107.024422 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Mathematics |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10164220 |
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