Enhanced Josephson coupling in hybrid nanojunctions

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorMontemurro, Domenico
dc.contributor.authorGolubev, Dmitry S.
dc.contributor.authorKubatkin, Sergey
dc.contributor.authorTafuri, Francesco
dc.contributor.authorBauch, Thilo
dc.contributor.authorLombardi, Floriana
dc.contributor.departmentChalmers University of Technology
dc.contributor.departmentCentre of Excellence in Quantum Technology, QTF
dc.contributor.departmentUniversity of Naples Federico II
dc.contributor.departmentDepartment of Applied Physicsen
dc.date.accessioned2023-04-19T06:06:16Z
dc.date.available2023-04-19T06:06:16Z
dc.date.issued2023-03
dc.descriptionFunding Information: This work was partially supported by the Foundation BLANCEFLOR Boncompagni Ludovisi and by Progetto PON RI 2014-2020 “AIM: Attraction and International Mobility.”
dc.description.abstractWe have fabricated NbN/Au nanogaps and bridged them with an Al superconductor using Ti as an interlayer. The nanodevices show a critical current density at 300 mK as high as 3×106A/cm2, which is 30% higher than that of Al nanowires with the same lateral dimensions as the NbN-based devices. The response of the critical current as a function of the external magnetic field clearly showed a Fraunhofer-like behavior, indicating a Josephson coupling between the NbN electrodes through the Al barrier. The superconducting transport evolves into different transport regimes as a function of the temperature. These findings demonstrate the importance of using superconducting barriers in hybrid nanodevices to achieve very high Josephson current in nanodevices of great relevance in superconducting circuits requiring high integration density.en
dc.description.versionPeer revieweden
dc.format.extent11
dc.format.extent1-11
dc.format.mimetypeapplication/pdf
dc.identifier.citationMontemurro , D , Golubev , D S , Kubatkin , S , Tafuri , F , Bauch , T & Lombardi , F 2023 , ' Enhanced Josephson coupling in hybrid nanojunctions ' , Physical Review B , vol. 107 , no. 9 , 094517 , pp. 1-11 . https://doi.org/10.1103/PhysRevB.107.094517en
dc.identifier.doi10.1103/PhysRevB.107.094517
dc.identifier.issn2469-9950
dc.identifier.issn2469-9969
dc.identifier.otherPURE UUID: 862652bf-e9a9-463d-8785-67e029e70756
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dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/120467
dc.identifier.urnURN:NBN:fi:aalto-202304192783
dc.language.isoenen
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review Ben
dc.relation.ispartofseriesVolume 107, issue 9en
dc.rightsopenAccessen
dc.titleEnhanced Josephson coupling in hybrid nanojunctionsen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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