Excitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb lattice

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorCity College of the City University of New York-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorLiu, Wei-
Autor(es): dc.creatorPunnoose, Alexander-
Data de aceite: dc.date.accessioned2025-08-21T22:50:43Z-
Data de disponibilização: dc.date.available2025-08-21T22:50:43Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2014-01-16-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1103/PhysRevB.89.045126-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/227521-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/227521-
Descrição: dc.descriptionWe 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.-
Descrição: dc.descriptionPhysics Department City College of the City University of New York, New York, NY 10031-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, R. Dr. Bento Teobaldo Ferraz 271, Barra Funda, São Paulo - SP, 01140-070-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, R. Dr. Bento Teobaldo Ferraz 271, Barra Funda, São Paulo - SP, 01140-070-
Idioma: dc.languageen-
Relação: dc.relationPhysical Review B - Condensed Matter and Materials Physics-
???dc.source???: dc.sourceScopus-
Título: dc.titleExcitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb lattice-
Tipo de arquivo: dc.typelivro digital-
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