Berezinskii-Kosterlitz-Thouless Phase Transition in 2D Spin-Orbit-Coupled Fulde-Herrell Superfluids

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dc.contributor.authorXu, Yongen_US
dc.contributor.authorZhang, Chuanweien_US
dc.contributor.utdAuthorZhang, Chuanweien_US
dc.date.accessioned2015-09-29T22:05:21Z
dc.date.available2015-09-29T22:05:21Z
dc.date.created2015-03-17en_US
dc.date.issued2015-03-17en_US
dc.description.abstractThe experimental observation of traditional Zeeman-field induced Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superfluids has been hindered by various challenges, in particular, the requirement of low dimensional systems. In 2D, finite temperature phase fluctuations lead to an extremely small Berezinskii-Kosterlitz-Thouless (BKT) transition temperature for FFLO superfluids, raising serious concerns regarding their experimental observability. Recently, it was shown that FFLO superfluids can be realized using a Rashba spin-orbit coupled Fermi gas subject to Zeeman fields, which may also support topological excitations such as Majorana fermions in 2D. Here we address the finite temperature BKT transition issue in this system, which may exhibit gapped, gapless, topological, and gapless topological FF phases. We find a large BKT transition temperature due to large effective superfluid densities, making it possible to observe 2D FF superfluids at finite temperature. In addition, we show that gapless FF superfluids can be stable due to their positive superfluid densities. These findings pave the way for the experimental observation of 2D gapped and gapless FF superfluids and their associated topological excitations at finite temperature.en_US
dc.description.sponsorship"This work is supported by ARO (W911NF-12-1-0334) and AFOSR (FA9550-11-1-0313 and FA9550-13-1-0045)."en_US
dc.identifier.bibliographicCitationXu, Y., and C. Zhang. 2015. "Berezinskii-Kosterlitz-Thouless phase transition in 2D spin-orbit-coupled Fulde-Ferrell superfluids." Physical Review Letters 114(11): doi:10.1103/PhysRevLett.114.110401.en_US
dc.identifier.issn0031-9007en_US
dc.identifier.issue11en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/4655
dc.identifier.volume114en_US
dc.language.isoenen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevLett.114.110401
dc.rights©2015 American Physical Societyen_US
dc.sourcePhysical Review Letters
dc.subjectElectron gasen_US
dc.subjectFermionsen_US
dc.subjectBerezinskii-Kosterlitz-Thouless transitionen_US
dc.subjectKosterlitz-Thouless transitionen_US
dc.subjectFulde–Ferrell–Larkin–Ovchinnikov phaseen_US
dc.subjectSuperfluidityen_US
dc.titleBerezinskii-Kosterlitz-Thouless Phase Transition in 2D Spin-Orbit-Coupled Fulde-Herrell Superfluidsen_US
dc.type.genreArticleen_US

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Zhang, Chuanwei
NSM Staff-Student Research