Low temperature properties of the triangular-lattice antiferromagnet: a bosonic spinon theory

Autores
Mezio, Alejandro; Manuel, Luis Oscar; Singh, Rajiv R. P.; Trumper, Adolfo Emilio
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We study the low temperature properties of the triangular-lattice Heisenberg antiferromagnet with a mean field Schwinger spin- boson scheme that reproduces quantitatively the zero temperature energy spectrum derived previously using series expansions. By analyzing the spin-spin and the boson density-density dynamical structure factors, we identify the unphysical spin excitations that come from the relaxation of the local constraint on bosons. This allows us to reconstruct a free energy based on the physical excitations only, whose predictions for entropy and uniform susceptibility seem to be reliable within the temperature range 0 <= T <= 0.3 J, which is difficult to access by other methods. The high values of entropy, also found in high temperature expansion studies, can be attributed to the roton-like narrowed dispersion at finite temperatures.
Fil: Mezio, Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina
Fil: Manuel, Luis Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina
Fil: Singh, Rajiv R. P.. University of California; Estados Unidos
Fil: Trumper, Adolfo Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina
Materia
STRONG CORRELATION
QUANTIZED SPIN MODEL
QUANTUM SPIN FRUSTRATION
SCHWINGER BOSONS
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:11336/271629
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/271629
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Low temperature properties of the triangular-lattice antiferromagnet: a bosonic spinon theoryMezio, AlejandroManuel, Luis OscarSingh, Rajiv R. P.Trumper, Adolfo EmilioSTRONG CORRELATIONQUANTIZED SPIN MODELQUANTUM SPIN FRUSTRATIONSCHWINGER BOSONShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We study the low temperature properties of the triangular-lattice Heisenberg antiferromagnet with a mean field Schwinger spin- boson scheme that reproduces quantitatively the zero temperature energy spectrum derived previously using series expansions. By analyzing the spin-spin and the boson density-density dynamical structure factors, we identify the unphysical spin excitations that come from the relaxation of the local constraint on bosons. This allows us to reconstruct a free energy based on the physical excitations only, whose predictions for entropy and uniform susceptibility seem to be reliable within the temperature range 0 <= T <= 0.3 J, which is difficult to access by other methods. The high values of entropy, also found in high temperature expansion studies, can be attributed to the roton-like narrowed dispersion at finite temperatures.Fil: Mezio, Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; ArgentinaFil: Manuel, Luis Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; ArgentinaFil: Singh, Rajiv R. P.. University of California; Estados UnidosFil: Trumper, Adolfo Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; ArgentinaIOP Publishing2012-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/271629Mezio, Alejandro; Manuel, Luis Oscar; Singh, Rajiv R. P.; Trumper, Adolfo Emilio; Low temperature properties of the triangular-lattice antiferromagnet: a bosonic spinon theory; IOP Publishing; New Journal of Physics; 14; 12; 12-2012; 1-161367-2630CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/1367-2630/14/12/123033info:eu-repo/semantics/altIdentifier/doi/10.1088/1367-2630/14/12/123033info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:42:08Zoai:ri.conicet.gov.ar:11336/271629instacron: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:34982025-09-29 09:42:08.817CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Low temperature properties of the triangular-lattice antiferromagnet: a bosonic spinon theory
title Low temperature properties of the triangular-lattice antiferromagnet: a bosonic spinon theory
spellingShingle Low temperature properties of the triangular-lattice antiferromagnet: a bosonic spinon theory
Mezio, Alejandro
STRONG CORRELATION
QUANTIZED SPIN MODEL
QUANTUM SPIN FRUSTRATION
SCHWINGER BOSONS
title_short Low temperature properties of the triangular-lattice antiferromagnet: a bosonic spinon theory
title_full Low temperature properties of the triangular-lattice antiferromagnet: a bosonic spinon theory
title_fullStr Low temperature properties of the triangular-lattice antiferromagnet: a bosonic spinon theory
title_full_unstemmed Low temperature properties of the triangular-lattice antiferromagnet: a bosonic spinon theory
title_sort Low temperature properties of the triangular-lattice antiferromagnet: a bosonic spinon theory
dc.creator.none.fl_str_mv Mezio, Alejandro
Manuel, Luis Oscar
Singh, Rajiv R. P.
Trumper, Adolfo Emilio
author Mezio, Alejandro
author_facet Mezio, Alejandro
Manuel, Luis Oscar
Singh, Rajiv R. P.
Trumper, Adolfo Emilio
author_role author
author2 Manuel, Luis Oscar
Singh, Rajiv R. P.
Trumper, Adolfo Emilio
author2_role author
author
author
dc.subject.none.fl_str_mv STRONG CORRELATION
QUANTIZED SPIN MODEL
QUANTUM SPIN FRUSTRATION
SCHWINGER BOSONS
topic STRONG CORRELATION
QUANTIZED SPIN MODEL
QUANTUM SPIN FRUSTRATION
SCHWINGER BOSONS
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 low temperature properties of the triangular-lattice Heisenberg antiferromagnet with a mean field Schwinger spin- boson scheme that reproduces quantitatively the zero temperature energy spectrum derived previously using series expansions. By analyzing the spin-spin and the boson density-density dynamical structure factors, we identify the unphysical spin excitations that come from the relaxation of the local constraint on bosons. This allows us to reconstruct a free energy based on the physical excitations only, whose predictions for entropy and uniform susceptibility seem to be reliable within the temperature range 0 <= T <= 0.3 J, which is difficult to access by other methods. The high values of entropy, also found in high temperature expansion studies, can be attributed to the roton-like narrowed dispersion at finite temperatures.
Fil: Mezio, Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina
Fil: Manuel, Luis Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina
Fil: Singh, Rajiv R. P.. University of California; Estados Unidos
Fil: Trumper, Adolfo Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina
description We study the low temperature properties of the triangular-lattice Heisenberg antiferromagnet with a mean field Schwinger spin- boson scheme that reproduces quantitatively the zero temperature energy spectrum derived previously using series expansions. By analyzing the spin-spin and the boson density-density dynamical structure factors, we identify the unphysical spin excitations that come from the relaxation of the local constraint on bosons. This allows us to reconstruct a free energy based on the physical excitations only, whose predictions for entropy and uniform susceptibility seem to be reliable within the temperature range 0 <= T <= 0.3 J, which is difficult to access by other methods. The high values of entropy, also found in high temperature expansion studies, can be attributed to the roton-like narrowed dispersion at finite temperatures.
publishDate 2012
dc.date.none.fl_str_mv 2012-12
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/11336/271629
Mezio, Alejandro; Manuel, Luis Oscar; Singh, Rajiv R. P.; Trumper, Adolfo Emilio; Low temperature properties of the triangular-lattice antiferromagnet: a bosonic spinon theory; IOP Publishing; New Journal of Physics; 14; 12; 12-2012; 1-16
1367-2630
CONICET Digital
CONICET
url http://hdl.handle.net/11336/271629
identifier_str_mv Mezio, Alejandro; Manuel, Luis Oscar; Singh, Rajiv R. P.; Trumper, Adolfo Emilio; Low temperature properties of the triangular-lattice antiferromagnet: a bosonic spinon theory; IOP Publishing; New Journal of Physics; 14; 12; 12-2012; 1-16
1367-2630
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/1367-2630/14/12/123033
info:eu-repo/semantics/altIdentifier/doi/10.1088/1367-2630/14/12/123033
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
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 13.070432

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