Broken discrete and continuous symmetries in two dimensional spiral antiferromagnets

Autores
Mezio, Alejandro; Sposetti, Cintia Natalia; Manuel, Luis Oscar; Trumper, Adolfo Emilio
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We study the occurrence of symmetry breakings, at zero and finite temperatures, in the J1-J3 antiferromagnetic Heisenberg model on the square lattice using Schwinger boson mean field theory. For spin 1/2 the ground state breaks always the SU(2) symmetry with a continuous quasi-critical transition at J3/J1 ~ 0.38,from Neel to spiral long range order, although local spin fluctuations considerations suggest an intermediate disordered regime around 0.35 ~ J3/J1 ~ 0.5, in qualitative agreement with recent numerical results. At low temperatures we find a Z2 broken symmetry region with short range spiral order characterized by an Ising-like nematic order parameter that compares qualitatively well with classical Monte Carlo results. At intermediate temperatures the phase diagram shows regions with collinear short range orders: for J3/J1 < 1 Neel (pi,pi) correlations and for J3/J1 > 1 a novel phase consisting of four decoupled third neighbour sublattices with Neel (pi,pi)_4 correlations in each one. We conclude that the effect of quantum and thermal fluctuations is to favour collinear correlations even in the strongly frustrated regime.
Fil: Mezio, Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); Argentina
Fil: Sposetti, Cintia Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); Argentina
Fil: Manuel, Luis Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); Argentina
Fil: Trumper, Adolfo Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); Argentina
Materia
Mott Insulator
Magnetic Frustration
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/5910
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/5910
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Broken discrete and continuous symmetries in two dimensional spiral antiferromagnetsMezio, AlejandroSposetti, Cintia NataliaManuel, Luis OscarTrumper, Adolfo EmilioMott InsulatorMagnetic Frustrationhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We study the occurrence of symmetry breakings, at zero and finite temperatures, in the J1-J3 antiferromagnetic Heisenberg model on the square lattice using Schwinger boson mean field theory. For spin 1/2 the ground state breaks always the SU(2) symmetry with a continuous quasi-critical transition at J3/J1 ~ 0.38,from Neel to spiral long range order, although local spin fluctuations considerations suggest an intermediate disordered regime around 0.35 ~ J3/J1 ~ 0.5, in qualitative agreement with recent numerical results. At low temperatures we find a Z2 broken symmetry region with short range spiral order characterized by an Ising-like nematic order parameter that compares qualitatively well with classical Monte Carlo results. At intermediate temperatures the phase diagram shows regions with collinear short range orders: for J3/J1 < 1 Neel (pi,pi) correlations and for J3/J1 > 1 a novel phase consisting of four decoupled third neighbour sublattices with Neel (pi,pi)_4 correlations in each one. We conclude that the effect of quantum and thermal fluctuations is to favour collinear correlations even in the strongly frustrated regime.Fil: Mezio, Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); ArgentinaFil: Sposetti, Cintia Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); ArgentinaFil: Manuel, Luis Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); ArgentinaFil: Trumper, Adolfo Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); ArgentinaIOP Publishing2013-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/5910Mezio, Alejandro; Sposetti, Cintia Natalia; Manuel, Luis Oscar; Trumper, Adolfo Emilio; Broken discrete and continuous symmetries in two dimensional spiral antiferromagnets; IOP Publishing; Journal Of Physics: Condensed Matter; 25; 9-2013; 465602-4656020953-8984enginfo:eu-repo/semantics/altIdentifier/doi/10.1088/0953-8984/25/46/465602info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/0953-8984/25/46/465602info:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1310.4798v1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:02:51Zoai:ri.conicet.gov.ar:11336/5910instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:02:51.639CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Broken discrete and continuous symmetries in two dimensional spiral antiferromagnets
title Broken discrete and continuous symmetries in two dimensional spiral antiferromagnets
spellingShingle Broken discrete and continuous symmetries in two dimensional spiral antiferromagnets
Mezio, Alejandro
Mott Insulator
Magnetic Frustration
title_short Broken discrete and continuous symmetries in two dimensional spiral antiferromagnets
title_full Broken discrete and continuous symmetries in two dimensional spiral antiferromagnets
title_fullStr Broken discrete and continuous symmetries in two dimensional spiral antiferromagnets
title_full_unstemmed Broken discrete and continuous symmetries in two dimensional spiral antiferromagnets
title_sort Broken discrete and continuous symmetries in two dimensional spiral antiferromagnets
dc.creator.none.fl_str_mv Mezio, Alejandro
Sposetti, Cintia Natalia
Manuel, Luis Oscar
Trumper, Adolfo Emilio
author Mezio, Alejandro
author_facet Mezio, Alejandro
Sposetti, Cintia Natalia
Manuel, Luis Oscar
Trumper, Adolfo Emilio
author_role author
author2 Sposetti, Cintia Natalia
Manuel, Luis Oscar
Trumper, Adolfo Emilio
author2_role author
author
author
dc.subject.none.fl_str_mv Mott Insulator
Magnetic Frustration
topic Mott Insulator
Magnetic Frustration
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We study the occurrence of symmetry breakings, at zero and finite temperatures, in the J1-J3 antiferromagnetic Heisenberg model on the square lattice using Schwinger boson mean field theory. For spin 1/2 the ground state breaks always the SU(2) symmetry with a continuous quasi-critical transition at J3/J1 ~ 0.38,from Neel to spiral long range order, although local spin fluctuations considerations suggest an intermediate disordered regime around 0.35 ~ J3/J1 ~ 0.5, in qualitative agreement with recent numerical results. At low temperatures we find a Z2 broken symmetry region with short range spiral order characterized by an Ising-like nematic order parameter that compares qualitatively well with classical Monte Carlo results. At intermediate temperatures the phase diagram shows regions with collinear short range orders: for J3/J1 < 1 Neel (pi,pi) correlations and for J3/J1 > 1 a novel phase consisting of four decoupled third neighbour sublattices with Neel (pi,pi)_4 correlations in each one. We conclude that the effect of quantum and thermal fluctuations is to favour collinear correlations even in the strongly frustrated regime.
Fil: Mezio, Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); Argentina
Fil: Sposetti, Cintia Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); Argentina
Fil: Manuel, Luis Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); Argentina
Fil: Trumper, Adolfo Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); Argentina
description We study the occurrence of symmetry breakings, at zero and finite temperatures, in the J1-J3 antiferromagnetic Heisenberg model on the square lattice using Schwinger boson mean field theory. For spin 1/2 the ground state breaks always the SU(2) symmetry with a continuous quasi-critical transition at J3/J1 ~ 0.38,from Neel to spiral long range order, although local spin fluctuations considerations suggest an intermediate disordered regime around 0.35 ~ J3/J1 ~ 0.5, in qualitative agreement with recent numerical results. At low temperatures we find a Z2 broken symmetry region with short range spiral order characterized by an Ising-like nematic order parameter that compares qualitatively well with classical Monte Carlo results. At intermediate temperatures the phase diagram shows regions with collinear short range orders: for J3/J1 < 1 Neel (pi,pi) correlations and for J3/J1 > 1 a novel phase consisting of four decoupled third neighbour sublattices with Neel (pi,pi)_4 correlations in each one. We conclude that the effect of quantum and thermal fluctuations is to favour collinear correlations even in the strongly frustrated regime.
publishDate 2013
dc.date.none.fl_str_mv 2013-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/5910
Mezio, Alejandro; Sposetti, Cintia Natalia; Manuel, Luis Oscar; Trumper, Adolfo Emilio; Broken discrete and continuous symmetries in two dimensional spiral antiferromagnets; IOP Publishing; Journal Of Physics: Condensed Matter; 25; 9-2013; 465602-465602
0953-8984
url http://hdl.handle.net/11336/5910
identifier_str_mv Mezio, Alejandro; Sposetti, Cintia Natalia; Manuel, Luis Oscar; Trumper, Adolfo Emilio; Broken discrete and continuous symmetries in two dimensional spiral antiferromagnets; IOP Publishing; Journal Of Physics: Condensed Matter; 25; 9-2013; 465602-465602
0953-8984
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1088/0953-8984/25/46/465602
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/0953-8984/25/46/465602
info:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1310.4798v1
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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