Three-sublattice skyrmion crystal in the antiferromagnetic triangular lattice

The frustrated classical antiferromagnetic Heisenberg model with Dzyaloshinskii-Moriya (DM) interactions on the triangular lattice is studied under a magnetic field by means of semiclassical calculations and large-scale Monte Carlo simulations. We show that even a small DM interaction induces the fo...

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Detalles Bibliográficos
Autores principales: Rosales, Héctor Diego, Cabra, Daniel Carlos, Pujol, Pierre
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Física
Physics
Paramagnetism
Antiferromagnetism
Heisenberg model
Condensed matter physics
Topological order
Ferromagnetism
Phase diagram
Skyrmion
Hexagonal lattice
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126016
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-126016
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
Paramagnetism
Antiferromagnetism
Heisenberg model
Condensed matter physics
Topological order
Ferromagnetism
Phase diagram
Skyrmion
Hexagonal lattice
spellingShingle Física
Physics
Paramagnetism
Antiferromagnetism
Heisenberg model
Condensed matter physics
Topological order
Ferromagnetism
Phase diagram
Skyrmion
Hexagonal lattice
Rosales, Héctor Diego
Cabra, Daniel Carlos
Pujol, Pierre
Three-sublattice skyrmion crystal in the antiferromagnetic triangular lattice
topic_facet Física
Physics
Paramagnetism
Antiferromagnetism
Heisenberg model
Condensed matter physics
Topological order
Ferromagnetism
Phase diagram
Skyrmion
Hexagonal lattice
description The frustrated classical antiferromagnetic Heisenberg model with Dzyaloshinskii-Moriya (DM) interactions on the triangular lattice is studied under a magnetic field by means of semiclassical calculations and large-scale Monte Carlo simulations. We show that even a small DM interaction induces the formation of an antiferromagnetic skyrmion crystal (AF-SkX) state. Unlike what is observed in ferromagnetic materials, we show that the AF-SkX state consists of three interpenetrating skyrmion crystals (one by sublattice), and most importantly, the AF-SkX state seems to survive in the limit of zero temperature. To characterize the phase diagram we compute the average of the topological order parameter which can be associated with the number of topological charges or skyrmions. As the magnetic field increases this parameter presents a clear jump, indicating a discontinuous transition from a spiral phase into the AF-SkX phase, where multiple Bragg peaks coexist in the spin structure factor. For higher fields, a second (probably continuous) transition occurs into a featureless paramagnetic phase.
format Articulo
Articulo
author Rosales, Héctor Diego
Cabra, Daniel Carlos
Pujol, Pierre
author_facet Rosales, Héctor Diego
Cabra, Daniel Carlos
Pujol, Pierre
author_sort Rosales, Héctor Diego
title Three-sublattice skyrmion crystal in the antiferromagnetic triangular lattice
title_short Three-sublattice skyrmion crystal in the antiferromagnetic triangular lattice
title_full Three-sublattice skyrmion crystal in the antiferromagnetic triangular lattice
title_fullStr Three-sublattice skyrmion crystal in the antiferromagnetic triangular lattice
title_full_unstemmed Three-sublattice skyrmion crystal in the antiferromagnetic triangular lattice
title_sort three-sublattice skyrmion crystal in the antiferromagnetic triangular lattice
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/126016
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AT cabradanielcarlos threesublatticeskyrmioncrystalintheantiferromagnetictriangularlattice
AT pujolpierre threesublatticeskyrmioncrystalintheantiferromagnetictriangularlattice
bdutipo_str Repositorios
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