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dc.contributor.authorPeltonen, Teemu
dc.contributor.authorOjajärvi, Risto
dc.contributor.authorHeikkilä, Tero
dc.date.accessioned2018-12-19T12:40:39Z
dc.date.available2018-12-19T12:40:39Z
dc.date.issued2018
dc.identifier.citationPeltonen, T., Ojajärvi, R., & Heikkilä, T. (2018). Mean-field theory for superconductivity in twisted bilayer graphene. <i>Physical Review B</i>, <i>98</i>(22), Article 220504(R). <a href="https://doi.org/10.1103/PhysRevB.98.220504" target="_blank">https://doi.org/10.1103/PhysRevB.98.220504</a>
dc.identifier.otherCONVID_28796233
dc.identifier.otherTUTKAID_79952
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/60699
dc.description.abstractRecent experiments show how a bilayer graphene twisted around a certain magic angle becomes superconducting as it is doped into a region with approximate flat bands. We investigate the mean-field s-wave superconducting state in such a system and show how the state evolves as the twist angle is tuned, and as a function of the doping level. We argue that part of the experimental findings could well be understood to result from an attractive electron-electron interaction mediated by electron-phonon coupling, but the flat-band nature of the excitation spectrum also makes the superconductivity quite unusual. For example, as the flat-band states are highly localized around certain spots in the structure, also the superconducting order parameter becomes strongly inhomogeneous.en
dc.format.mimetypeapplication/pdf
dc.languageeng
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review B
dc.rightsIn Copyright
dc.subject.othersuperconducting gap
dc.subject.othersuperconducting order parameter
dc.subject.othersuperconducting phase transition
dc.titleMean-field theory for superconductivity in twisted bilayer graphene
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201812185205
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.contributor.oppiaineFysiikkafi
dc.contributor.oppiaineNanoscience Centerfi
dc.contributor.oppiainePhysicsen
dc.contributor.oppiaineNanoscience Centeren
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2018-12-18T16:15:10Z
dc.description.reviewstatuspeerReviewed
dc.relation.issn2469-9950
dc.relation.numberinseries22
dc.relation.volume98
dc.type.versionpublishedVersion
dc.rights.copyright© 2018 American Physical Society
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber284594 AALTO YO
dc.relation.grantnumber305256
dc.subject.ysosuprajohtavuus
dc.subject.ysografeeni
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p9398
jyx.subject.urihttp://www.yso.fi/onto/yso/p24483
dc.rights.urlhttp://rightsstatements.org/page/InC/1.0/?language=en
dc.relation.doi10.1103/PhysRevB.98.220504
dc.relation.funderSuomen Akatemiafi
dc.relation.funderSuomen Akatemiafi
dc.relation.funderAcademy of Finlanden
dc.relation.funderAcademy of Finlanden
jyx.fundingprogramHuippuyksikkörahoitus, SAfi
jyx.fundingprogramMuut, SAfi
jyx.fundingprogramCentre of Excellence, AoFen
jyx.fundingprogramOthers, AoFen
jyx.fundinginformationThis project was supported by Academy of Finland Key Project funding, and the Center of Excellence program (Projects No. 305256 and No. 284594). We acknowledge grants of computer capacity from the Finnish Grid and Cloud Infrastructure (persistent identifier urn:nbn:fi:research-infras-2016072533).


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