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

Página do item simplificado
dc.contributor.authorLiu, Wei
dc.contributor.authorPunnoose, Alexander [UNESP]
dc.contributor.institutionCUNY City Coll
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-12-03T13:11:19Z
dc.date.available2014-12-03T13:11:19Z
dc.date.issued2014-01-16
dc.description.abstractWe 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.en
dc.description.affiliationCUNY City Coll, Dept Phys, New York, NY 10031 USA
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil
dc.description.sponsorshipPSC-CUNY
dc.description.sponsorshipIdPSC-CUNY41
dc.format.extent8
dc.identifierhttp://dx.doi.org/10.1103/PhysRevB.89.045126
dc.identifier.citationPhysical Review B. College Pk: Amer Physical Soc, v. 89, n. 4, 8 p., 2014.
dc.identifier.doi10.1103/PhysRevB.89.045126
dc.identifier.fileWOS000332221400003.pdf
dc.identifier.issn1098-0121
dc.identifier.urihttp://hdl.handle.net/11449/113011
dc.identifier.wosWOS:000332221400003
dc.language.isoeng
dc.publisherAmer Physical Soc
dc.relation.ispartofPhysical Review B
dc.relation.ispartofsjr1,604
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleExcitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb latticeen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmer Physical Soc
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt

Arquivos

Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
WOS000332221400003.pdf
Tamanho:
244.21 KB
Formato:
Adobe Portable Document Format
Baixar

Coleções

Artigos - Instituto de Física Teórica (IFT)