Excitation of single quasiparticles in a small superconducting Al island connected to normal-metal leads by tunnel junctions

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorMaisi, Ville
dc.contributor.authorLotkhov, S.V.
dc.contributor.authorKemppinen, A.
dc.contributor.authorHeimes, A.
dc.contributor.authorMuhonen, J.T.
dc.contributor.authorPekola, J.P.
dc.contributor.departmentDepartment of Applied Physics
dc.date.accessioned2018-05-22T14:47:22Z
dc.date.available2018-05-22T14:47:22Z
dc.date.issued2013-10-03
dc.description.abstractWe investigate the dynamics of individual quasiparticle excitations on a small superconducting aluminum island connected to normal metallic leads by tunnel junctions. We find the island to be free of excitations within the measurement resolution. This allows us to show that the residual heating, which typically limits experiments on superconductors, has an ultralow value of less than 0.1 aW. By injecting electrons with a periodic gate voltage, we probe electron-phonon interaction and relaxation down to a single quasiparticle excitation pair, with a measured recombination rate of 16 kHz. Our experiment yields a strong test of BCS theory in aluminum as the results are consistent with it without free parameters.en
dc.description.versionPeer revieweden
dc.format.extent5
dc.format.extent1-5
dc.format.mimetypeapplication/pdf
dc.identifier.citationMaisi , V , Lotkhov , S V , Kemppinen , A , Heimes , A , Muhonen , J T & Pekola , J P 2013 , ' Excitation of single quasiparticles in a small superconducting Al island connected to normal-metal leads by tunnel junctions ' , Physical Review Letters , vol. 111 , no. 14 , 147001 , pp. 1-5 . https://doi.org/10.1103/PhysRevLett.111.147001en
dc.identifier.doi10.1103/PhysRevLett.111.147001
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.otherPURE UUID: bfde57f0-7a12-448a-b33d-016e8db0d933
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/bfde57f0-7a12-448a-b33d-016e8db0d933
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/13437154/PhysRevLett.111.147001.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/31147
dc.identifier.urnURN:NBN:fi:aalto-201805222587
dc.language.isoenen
dc.relation.ispartofseriesPHYSICAL REVIEW LETTERSen
dc.relation.ispartofseriesVolume 111, issue 14en
dc.rightsopenAccessen
dc.titleExcitation of single quasiparticles in a small superconducting Al island connected to normal-metal leads by tunnel junctionsen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion

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