Exchange-Correlation effects and the quasiparticle properties in a two-dimensional dipolar fermi liquid

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buir.contributor.authorTanatar, Bilal
buir.contributor.orcidTanatar, Bilal|0000-0002-5246-0119
dc.citation.epage2374en_US
dc.citation.issueNumber8en_US
dc.citation.spage2369en_US
dc.citation.volumeNumber33en_US
dc.contributor.authorSeydi, I.
dc.contributor.authorAbedinpour, S. H.
dc.contributor.authorAsgari, R.
dc.contributor.authorTanatar, Bilal
dc.date.accessioned2021-02-19T10:39:24Z
dc.date.available2021-02-19T10:39:24Z
dc.date.issued2020
dc.departmentDepartment of Physicsen_US
dc.description.abstractWe investigate the effects of exchange and correlation on the quasiparticle properties such as the self-energy, the many-body effective mass and the renormalization constant in a two-dimensional system of ultracold dipolar fermions with dipole moments aligned in the perpendicular direction to the plane. We use the G0W approximation along with the generalized random phase approximation, where the many-body effects have been incorporated in the effective interaction W through the Hubbard local-field factor. The many-body effective mass and the renormalization constant are reduced with the increase of coupling strength. We also study the effect of dipole-dipole interaction on the single-particle spectral function of the two dimensional dipolar Fermi liquid. We observe composite hole-zero sound excitation which is a bound state of quasiparticles with the collective mode (i.e. zero-sound) at intermediate and high coupling constants. These composite excitations are undamped at small wave vectors. Due to repulsion between quasiparticle and composite excitation resonances, we find a gap-like feature between quasiparticle and composite excitation dispersions at long wavelengths.en_US
dc.description.sponsorshipBT acknowledges support from TUBA. SHA thanks TUBA for a travel grant during which this work is completed.en_US
dc.identifier.doi10.1007/s10948-019-05371-7en_US
dc.identifier.issn1557-1939
dc.identifier.urihttp://hdl.handle.net/11693/75488
dc.language.isoEnglishen_US
dc.publisherSpringeren_US
dc.relation.isversionofhttps://dx.doi.org/10.1007/s10948-019-05371-7en_US
dc.source.titleJournal of Superconductivity and Novel Magnetismen_US
dc.subjectDipolar fermi liquiden_US
dc.subjectG0Wen_US
dc.subjectEffective massen_US
dc.subjectRenormalization constanten_US
dc.subjectSpectral functionen_US
dc.subjectComposite quasiparticlesen_US
dc.titleExchange-Correlation effects and the quasiparticle properties in a two-dimensional dipolar fermi liquiden_US
dc.typeArticleen_US

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