Finite-momentum condensate of magnetic excitons in a bilayer quantum Hall system

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dc.contributor.authorDoretto, R. L. [UNESP]
dc.contributor.authorMorais Smith, C.
dc.contributor.authorCaldeira, A. O.
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUtrecht University
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.date.accessioned2022-04-29T04:22:54Z
dc.date.available2022-04-29T04:22:54Z
dc.date.issued2012-07-26
dc.description.abstractWe study the bilayer quantum Hall system at total filling factor ν T=1 within a bosonization formalism which allows us to approximately treat the magnetic exciton as a boson. We show that in the region where the distance between the two layers is comparable to the magnetic length, the ground state of the system can be seen as a finite-momentum condensate of magnetic excitons provided that the excitation spectrum is gapped. We analyze the stability of such a phase within the Bogoliubov approximation first assuming that only one momentum Q is macroscopically occupied and later we consider the same situation for two modes ±Q. We find strong evidences that a first-order quantum phase transition at small interlayer separation takes place from a zero-momentum condensate phase, which corresponds to Halperin 111 state, to a finite-momentum condensate of magnetic excitons. © 2012 American Physical Society.en
dc.description.affiliationInstituto de Física Teórica Universidade Estadual Paulista, 01140-070 São Paulo, SP
dc.description.affiliationInstitute for Theoretical Physics Utrecht University, 3584 CE Utrecht
dc.description.affiliationInstituto de Física Gleb Wataghin Universidade Estadual de Campinas, 13083-970 Campinas, SP
dc.description.affiliationUnespInstituto de Física Teórica Universidade Estadual Paulista, 01140-070 São Paulo, SP
dc.identifierhttp://dx.doi.org/10.1103/PhysRevB.86.035326
dc.identifier.citationPhysical Review B - Condensed Matter and Materials Physics, v. 86, n. 3, 2012.
dc.identifier.doi10.1103/PhysRevB.86.035326
dc.identifier.issn1098-0121
dc.identifier.issn1550-235X
dc.identifier.scopus2-s2.0-84864607763
dc.identifier.urihttp://hdl.handle.net/11449/226923
dc.language.isoeng
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physics
dc.sourceScopus
dc.titleFinite-momentum condensate of magnetic excitons in a bilayer quantum Hall systemen
dc.typeArtigo

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