Fulde-Ferrell states and Berezinskii-Kosterlitz-Thouless phase transition in two-dimensional imbalanced Fermi gases

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorYin, Shaoyu
dc.contributor.authorMartikainen, J.-P.
dc.contributor.authorTörmä, Päivi
dc.contributor.departmentDepartment of Applied Physics
dc.date.accessioned2016-09-08T08:30:02Z
dc.date.issued2014-01-01
dc.description.abstractWe study the superfluid properties of two-dimensional spin-population-imbalanced Fermi gases to explore the interplay between the Berezinskii-Kosterlitz-Thouless (BKT) phase transition and the possible instability towards the Fulde-Ferrell (FF) state. By the mean-field approximation together with quantum fluctuations, we obtain phase diagrams as functions of temperature, chemical potential imbalance, and binding energy. We find that the fluctuations change the mean-field phase diagram significantly. We also address possible effects of the phase separation and/or the anisotropic FF phase to the BKT mechanism. The superfluid density tensor of the FF state is obtained, and its transverse component is found always vanishing. This causes divergent fluctuations and possibly precludes the existence of the FF state at any nonzero temperature.en
dc.description.versionPeer revieweden
dc.format.extent18
dc.format.extent1-18
dc.format.mimetypeapplication/pdf
dc.identifier.citationYin , S , Martikainen , J-P & Törmä , P 2014 , ' Fulde-Ferrell states and Berezinskii-Kosterlitz-Thouless phase transition in two-dimensional imbalanced Fermi gases ' , Physical Review B , vol. 89 , no. 1 , 014507 , pp. 1-18 . https://doi.org/10.1103/PhysRevB.89.014507en
dc.identifier.doi10.1103/PhysRevB.89.014507
dc.identifier.issn1098-0121
dc.identifier.issn1550-235X
dc.identifier.otherPURE UUID: b54e45f7-215e-4429-8e40-e0539a4cf1b2
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/b54e45f7-215e-4429-8e40-e0539a4cf1b2
dc.identifier.otherPURE LINK: http://prb.aps.org/abstract/PRB/v89/i1/e014507
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/2474789/PhysRevB.89.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/21871
dc.identifier.urnURN:NBN:fi:aalto-201609083757
dc.language.isoenen
dc.relation.ispartofseriesPHYSICAL REVIEW Ben
dc.relation.ispartofseriesVolume 89, issue 1en
dc.rightsopenAccessen
dc.subject.keywordBKT
dc.subject.keywordFFLO,
dc.subject.keywordFFLO
dc.titleFulde-Ferrell states and Berezinskii-Kosterlitz-Thouless phase transition in two-dimensional imbalanced Fermi gasesen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion

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