Unconventional superconductivity with preformed pairs in twisted bilayer graphene

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorIslam, Sk Firozen_US
dc.contributor.authorZyuzin, A. Yuen_US
dc.contributor.authorZyuzin, Alexander A.en_US
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.groupauthorCentre of Excellence in Quantum Technology, QTFen
dc.contributor.groupauthorQuantum Circuits and Correlationsen
dc.contributor.organizationAalto Universityen_US
dc.contributor.organizationIoffe Instituteen_US
dc.date.accessioned2023-04-05T06:19:43Z
dc.date.available2023-04-05T06:19:43Z
dc.date.issued2023-02-01en_US
dc.descriptionFunding Information: This work is supported by Academy of Finland Grant No. 308339. A.A.Z. also acknowledges the Center of Excellence in Quantum Technology Finland. The authors acknowledge Jose Lado for useful comments. Publisher Copyright: © 2023 American Physical Society.
dc.description.abstractWe present a theory of superconductivity in magic-angle twisted bilayer graphene and analyze the superconducting phase diagram in the presence of the magnetic field. Namely, we consider a model of a granular array hosting localized states, which are hybridized via the delocalized fermions in the intergrain regions. We study a strong-coupling situation when the interactions lead to an incoherent state with preformed Cooper pairs inside the grains. The Andreev scattering among different grains manifests itself through the global phase-coherent superconducting state at lower temperatures. We demonstrate that a new phase transition between the preformed Cooper pairing state and the Larkin-Ovchinnikov-Fulde-Ferrell state might be induced by the spin pair-breaking effect of in-plane magnetic field. The upper critical magnetic field is shown to be enhanced in the strong-coupling case.en
dc.description.versionPeer revieweden
dc.format.extent6
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationIslam, S F, Zyuzin, A Y & Zyuzin, A A 2023, 'Unconventional superconductivity with preformed pairs in twisted bilayer graphene', Physical Review B, vol. 107, no. 6, L060503, pp. 1-6. https://doi.org/10.1103/PhysRevB.107.L060503en
dc.identifier.doi10.1103/PhysRevB.107.L060503en_US
dc.identifier.issn2469-9950
dc.identifier.issn2469-9969
dc.identifier.otherPURE UUID: ee8e689e-1bb9-4443-abb8-5c8af583c733en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/ee8e689e-1bb9-4443-abb8-5c8af583c733en_US
dc.identifier.otherPURE LINK: https://arxiv.org/abs/2208.12039
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/104921990/Unconventional_superconductivity_with_preformed_pairs_in_twisted_bilayer_graphene.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/120377
dc.identifier.urnURN:NBN:fi:aalto-202304052695
dc.language.isoenen
dc.publisherAmerican Physical Society
dc.relation.fundinginfoThis work is supported by Academy of Finland Grant No. 308339. A.A.Z. also acknowledges the Center of Excellence in Quantum Technology Finland. The authors acknowledge Jose Lado for useful comments. Acknowledgments. This work is supported by Academy of Finland Grant No. 308339. A.A.Z. also acknowledges the Center of Excellence in Quantum Technology Finland. The authors acknowledge Jose Lado for useful comments.
dc.relation.ispartofseriesPhysical Review Ben
dc.relation.ispartofseriesVolume 107, issue 6, pp. 1-6en
dc.rightsopenAccessen
dc.titleUnconventional superconductivity with preformed pairs in twisted bilayer grapheneen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion

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