From skyrmions to Z2 vortices in distorted chiral antiferromagnets

Swirling topological spin configurations, known as magnetic skyrmions, are known to be stabilised in chiral ferromagnets with Dzyaloshinskii-Moriya interaction (DMI). In particular, for appropriate values of the external magnetic field they appear in a topological crystalline phase, termed Skyrmion...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Osorio, Santiago Antonio, Sturla, Mauricio, Rosales, Héctor Diego, Cabra, Daniel Carlos
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2019
Materias:
Física
Physics
Mathematical physics
Skyrmion
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/125535
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-125535
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Physics
Mathematical physics
Skyrmion
spellingShingle Física
Physics
Mathematical physics
Skyrmion
Osorio, Santiago Antonio
Sturla, Mauricio
Rosales, Héctor Diego
Cabra, Daniel Carlos
From skyrmions to Z2 vortices in distorted chiral antiferromagnets
topic_facet Física
Physics
Mathematical physics
Skyrmion
description Swirling topological spin configurations, known as magnetic skyrmions, are known to be stabilised in chiral ferromagnets with Dzyaloshinskii-Moriya interaction (DMI). In particular, for appropriate values of the external magnetic field they appear in a topological crystalline phase, termed Skyrmion crystal phase (SkX). A similar phenomenon is present in the antiferromagnetic case, for the Heisenberg triangular antiferromagnet (HTAF) with DMI. Here, the most striking feature is that the emergent topological phase consists of three SkX interpenetrated sublattices. On the other hand, the pure HTAF, being described by an SO(3) order parameter, can host ℤ₂ vortices. This rises the fundamental question on whether both non trivial structures are related. In this paper we unravel a hidden connection between both topological entities by studying the HTAF with anisotropic DMI. To this end, we combine an effective field theory description, the Luttinger-Tisza approximation and Monte Carlo simulations. We show that even a slight anisotropy in the DMI proves to be the key ingredient to deform the interpenetrated SkX structure and reveal a ℤ₂-vortex crystal.
format Articulo
Preprint
author Osorio, Santiago Antonio
Sturla, Mauricio
Rosales, Héctor Diego
Cabra, Daniel Carlos
author_facet Osorio, Santiago Antonio
Sturla, Mauricio
Rosales, Héctor Diego
Cabra, Daniel Carlos
author_sort Osorio, Santiago Antonio
title From skyrmions to Z2 vortices in distorted chiral antiferromagnets
title_short From skyrmions to Z2 vortices in distorted chiral antiferromagnets
title_full From skyrmions to Z2 vortices in distorted chiral antiferromagnets
title_fullStr From skyrmions to Z2 vortices in distorted chiral antiferromagnets
title_full_unstemmed From skyrmions to Z2 vortices in distorted chiral antiferromagnets
title_sort from skyrmions to z2 vortices in distorted chiral antiferromagnets
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/125535
work_keys_str_mv AT osoriosantiagoantonio fromskyrmionstoz2vorticesindistortedchiralantiferromagnets
AT sturlamauricio fromskyrmionstoz2vorticesindistortedchiralantiferromagnets
AT rosaleshectordiego fromskyrmionstoz2vorticesindistortedchiralantiferromagnets
AT cabradanielcarlos fromskyrmionstoz2vorticesindistortedchiralantiferromagnets
bdutipo_str Repositorios
_version_ 1764820451825025025

Ejemplares similares