Publicação: Excitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb lattice
dc.contributor.author | Liu, Wei | |
dc.contributor.author | Punnoose, Alexander [UNESP] | |
dc.contributor.institution | CUNY City Coll | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-12-03T13:11:19Z | |
dc.date.available | 2014-12-03T13:11:19Z | |
dc.date.issued | 2014-01-16 | |
dc.description.abstract | 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. | en |
dc.description.affiliation | CUNY City Coll, Dept Phys, New York, NY 10031 USA | |
dc.description.affiliation | Univ Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil | |
dc.description.affiliationUnesp | Univ Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil | |
dc.description.sponsorship | PSC-CUNY | |
dc.description.sponsorshipId | PSC-CUNY41 | |
dc.format.extent | 8 | |
dc.identifier | http://dx.doi.org/10.1103/PhysRevB.89.045126 | |
dc.identifier.citation | Physical Review B. College Pk: Amer Physical Soc, v. 89, n. 4, 8 p., 2014. | |
dc.identifier.doi | 10.1103/PhysRevB.89.045126 | |
dc.identifier.file | WOS000332221400003.pdf | |
dc.identifier.issn | 1098-0121 | |
dc.identifier.uri | http://hdl.handle.net/11449/113011 | |
dc.identifier.wos | WOS:000332221400003 | |
dc.language.iso | eng | |
dc.publisher | Amer Physical Soc | |
dc.relation.ispartof | Physical Review B | |
dc.relation.ispartofsjr | 1,604 | |
dc.rights.accessRights | Acesso aberto | |
dc.source | Web of Science | |
dc.title | Excitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb lattice | en |
dc.type | Artigo | |
dcterms.license | http://publish.aps.org/authors/transfer-of-copyright-agreement | |
dcterms.rightsHolder | Amer Physical Soc | |
dspace.entity.type | Publication | |
unesp.campus | Universidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulo | pt |
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