Three-sublattice skyrmion crystal in the antiferromagnetic triangular lattice

Autores
Rosales, Héctor Diego; Cabra, Daniel Carlos; Pujol, Pierre
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Instituto de Física La Plata
Materia
Física
Physics
Paramagnetism
Antiferromagnetism
Heisenberg model
Condensed matter physics
Topological order
Ferromagnetism
Phase diagram
Skyrmion
Hexagonal lattice
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/126016
Acceder
id SEDICI_6d662d9a174b43a8b4d86ab94bcffa24
oai_identifier_str oai:sedici.unlp.edu.ar:10915/126016
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Three-sublattice skyrmion crystal in the antiferromagnetic triangular latticeRosales, Héctor DiegoCabra, Daniel CarlosPujol, PierreFísicaPhysicsParamagnetismAntiferromagnetismHeisenberg modelCondensed matter physicsTopological orderFerromagnetismPhase diagramSkyrmionHexagonal latticeThe 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.Instituto de Física La Plata2015-12-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/126016enginfo:eu-repo/semantics/altIdentifier/issn/1098-0121info:eu-repo/semantics/altIdentifier/issn/1550-235Xinfo:eu-repo/semantics/altIdentifier/arxiv/1507.05109info:eu-repo/semantics/altIdentifier/doi/10.1103/physrevb.92.214439info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:30:18Zoai:sedici.unlp.edu.ar:10915/126016Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:30:19.089SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Three-sublattice skyrmion crystal in the antiferromagnetic triangular lattice
title Three-sublattice skyrmion crystal in the antiferromagnetic triangular lattice
spellingShingle Three-sublattice skyrmion crystal in the antiferromagnetic triangular lattice
Rosales, Héctor Diego
Física
Physics
Paramagnetism
Antiferromagnetism
Heisenberg model
Condensed matter physics
Topological order
Ferromagnetism
Phase diagram
Skyrmion
Hexagonal 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
dc.creator.none.fl_str_mv Rosales, Héctor Diego
Cabra, Daniel Carlos
Pujol, Pierre
author Rosales, Héctor Diego
author_facet Rosales, Héctor Diego
Cabra, Daniel Carlos
Pujol, Pierre
author_role author
author2 Cabra, Daniel Carlos
Pujol, Pierre
author2_role author
author
dc.subject.none.fl_str_mv Física
Physics
Paramagnetism
Antiferromagnetism
Heisenberg model
Condensed matter physics
Topological order
Ferromagnetism
Phase diagram
Skyrmion
Hexagonal lattice
topic Física
Physics
Paramagnetism
Antiferromagnetism
Heisenberg model
Condensed matter physics
Topological order
Ferromagnetism
Phase diagram
Skyrmion
Hexagonal lattice
dc.description.none.fl_txt_mv 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.
Instituto de Física La Plata
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.
publishDate 2015
dc.date.none.fl_str_mv 2015-12-30
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/126016
url http://sedici.unlp.edu.ar/handle/10915/126016
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1098-0121
info:eu-repo/semantics/altIdentifier/issn/1550-235X
info:eu-repo/semantics/altIdentifier/arxiv/1507.05109
info:eu-repo/semantics/altIdentifier/doi/10.1103/physrevb.92.214439
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.070432

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