Excitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb lattice
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevB.89.045126 http://hdl.handle.net/11449/227521 |
Resumo: | We elucidate the close relationship between spontaneous time-reversal symmetry breaking and the physics of excitonic instabilities in strongly correlated multiband systems. The underlying mechanism responsible for the spontaneous breaking of time-reversal symmetry in a many-body system is closely related to the Cooper-like pairing instability of interband particle-hole pairs involving higher-order symmetries. Studies of such pairing instabilities have, however, mainly focused on the mean-field aspects of the virtual exciton condensate, which ignores the presence of the underlying collective Fermi-liquid excitations. We show that this relationship can be exploited to systematically derive the coupling of the condensate order parameter to the intraband Fermi-liquid particle-hole excitations. Surprisingly, we find that the static susceptibility is negative in the ordered phase when the coupling to the Fermi-liquid collective excitations are included, suggesting that a uniform condensate of virtual excitons, with or without time-reversal breaking, is an unstable phase at T=0. © 2014 American Physical Society. |
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Excitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb latticeWe elucidate the close relationship between spontaneous time-reversal symmetry breaking and the physics of excitonic instabilities in strongly correlated multiband systems. The underlying mechanism responsible for the spontaneous breaking of time-reversal symmetry in a many-body system is closely related to the Cooper-like pairing instability of interband particle-hole pairs involving higher-order symmetries. Studies of such pairing instabilities have, however, mainly focused on the mean-field aspects of the virtual exciton condensate, which ignores the presence of the underlying collective Fermi-liquid excitations. We show that this relationship can be exploited to systematically derive the coupling of the condensate order parameter to the intraband Fermi-liquid particle-hole excitations. Surprisingly, we find that the static susceptibility is negative in the ordered phase when the coupling to the Fermi-liquid collective excitations are included, suggesting that a uniform condensate of virtual excitons, with or without time-reversal breaking, is an unstable phase at T=0. © 2014 American Physical Society.Physics Department City College of the City University of New York, New York, NY 10031Instituto de Física Teórica Universidade Estadual Paulista, R. Dr. Bento Teobaldo Ferraz 271, Barra Funda, São Paulo - SP, 01140-070Instituto de Física Teórica Universidade Estadual Paulista, R. Dr. Bento Teobaldo Ferraz 271, Barra Funda, São Paulo - SP, 01140-070City College of the City University of New YorkUniversidade Estadual Paulista (UNESP)Liu, WeiPunnoose, Alexander [UNESP]2022-04-29T07:13:45Z2022-04-29T07:13:45Z2014-01-16info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevB.89.045126Physical Review B - Condensed Matter and Materials Physics, v. 89, n. 4, 2014.1098-01211550-235Xhttp://hdl.handle.net/11449/22752110.1103/PhysRevB.89.0451262-s2.0-84893155085Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review B - Condensed Matter and Materials Physicsinfo:eu-repo/semantics/openAccess2022-04-29T07:13:45Zoai:repositorio.unesp.br:11449/227521Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:26:47.831526Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Excitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb lattice |
title |
Excitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb lattice |
spellingShingle |
Excitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb lattice Liu, Wei |
title_short |
Excitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb lattice |
title_full |
Excitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb lattice |
title_fullStr |
Excitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb lattice |
title_full_unstemmed |
Excitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb lattice |
title_sort |
Excitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb lattice |
author |
Liu, Wei |
author_facet |
Liu, Wei Punnoose, Alexander [UNESP] |
author_role |
author |
author2 |
Punnoose, Alexander [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
City College of the City University of New York Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Liu, Wei Punnoose, Alexander [UNESP] |
description |
We elucidate the close relationship between spontaneous time-reversal symmetry breaking and the physics of excitonic instabilities in strongly correlated multiband systems. The underlying mechanism responsible for the spontaneous breaking of time-reversal symmetry in a many-body system is closely related to the Cooper-like pairing instability of interband particle-hole pairs involving higher-order symmetries. Studies of such pairing instabilities have, however, mainly focused on the mean-field aspects of the virtual exciton condensate, which ignores the presence of the underlying collective Fermi-liquid excitations. We show that this relationship can be exploited to systematically derive the coupling of the condensate order parameter to the intraband Fermi-liquid particle-hole excitations. Surprisingly, we find that the static susceptibility is negative in the ordered phase when the coupling to the Fermi-liquid collective excitations are included, suggesting that a uniform condensate of virtual excitons, with or without time-reversal breaking, is an unstable phase at T=0. © 2014 American Physical Society. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-01-16 2022-04-29T07:13:45Z 2022-04-29T07:13:45Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1103/PhysRevB.89.045126 Physical Review B - Condensed Matter and Materials Physics, v. 89, n. 4, 2014. 1098-0121 1550-235X http://hdl.handle.net/11449/227521 10.1103/PhysRevB.89.045126 2-s2.0-84893155085 |
url |
http://dx.doi.org/10.1103/PhysRevB.89.045126 http://hdl.handle.net/11449/227521 |
identifier_str_mv |
Physical Review B - Condensed Matter and Materials Physics, v. 89, n. 4, 2014. 1098-0121 1550-235X 10.1103/PhysRevB.89.045126 2-s2.0-84893155085 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review B - Condensed Matter and Materials Physics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129521895866368 |