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dc.contributor.authorSeifert, Tom Sen
dc.contributor.authorJaiswal, Samridhen
dc.contributor.authorBarker, Josephen
dc.contributor.authorWeber, Sebastian Ten
dc.contributor.authorRazdolski, Ilyaen
dc.contributor.authorCramer, Joelen
dc.contributor.authorGueckstock, Oliveren
dc.contributor.authorMaehrlein, Sebastian Fen
dc.contributor.authorNadvornik, Lukasen
dc.contributor.authorWatanabe, Shunen
dc.contributor.authorCiccarelli, Chiaraen
dc.contributor.authorMelnikov, Alexeyen
dc.contributor.authorJakob, Gerharden
dc.contributor.authorMünzenberg, Markusen
dc.contributor.authorGoennenwein, Sebastian TBen
dc.contributor.authorWoltersdorf, Georgen
dc.contributor.authorRethfeld, Baerbelen
dc.contributor.authorBrouwer, Piet Wen
dc.contributor.authorWolf, Martinen
dc.contributor.authorKläui, Mathiasen
dc.contributor.authorKampfrath, Tobiasen
dc.date.accessioned2019-03-07T00:30:15Z
dc.date.available2019-03-07T00:30:15Z
dc.date.issued2018-07-24en
dc.identifier.issn2041-1723
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/290274
dc.description.abstractUnderstanding the transfer of spin angular momentum is essential in modern magnetism research. A model case is the generation of magnons in magnetic insulators by heating an adjacent metal film. Here, we reveal the initial steps of this spin Seebeck effect with <27 fs time resolution using terahertz spectroscopy on bilayers of ferrimagnetic yttrium iron garnet and platinum. Upon exciting the metal with an infrared laser pulse, a spin Seebeck current js arises on the same ~100 fs time scale on which the metal electrons thermalize. This observation highlights that efficient spin transfer critically relies on carrier multiplication and is driven by conduction electrons scattering off the metal-insulator interface. Analytical modeling shows that the electrons' dynamics are almost instantaneously imprinted onto js because their spins have a correlation time of only ~4 fs and deflect the ferrimagnetic moments without inertia. Applications in material characterization, interface probing, spin-noise spectroscopy and terahertz spin pumping emerge.
dc.format.mediumElectronicen
dc.languageengen
dc.rights
dc.rights.uri
dc.titleFemtosecond formation dynamics of the spin Seebeck effect revealed by terahertz spectroscopy.en
dc.typeArticle
prism.issueIdentifier1en
prism.publicationDate2018en
prism.publicationNameNature communicationsen
prism.startingPage2899
prism.volume9en
dc.identifier.doi10.17863/CAM.37501
dcterms.dateAccepted2018-06-13en
rioxxterms.versionofrecord10.1038/s41467-018-05135-2en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2018-07-24en
dc.contributor.orcidJaiswal, Samridh [0000-0002-5207-6029]
dc.contributor.orcidBarker, Joseph [0000-0003-4843-5516]
dc.contributor.orcidWeber, Sebastian T [0000-0002-9090-2248]
dc.contributor.orcidGueckstock, Oliver [0000-0003-2361-127X]
dc.contributor.orcidMaehrlein, Sebastian F [0000-0002-9472-5701]
dc.contributor.orcidCiccarelli, Chiara [0000-0003-2299-3704]
dc.contributor.orcidMünzenberg, Markus [0000-0002-1332-5678]
dc.contributor.orcidGoennenwein, Sebastian TB [0000-0002-5388-700X]
dc.contributor.orcidKläui, Mathias [0000-0002-4848-2569]
dc.identifier.eissn2041-1723
rioxxterms.typeJournal Article/Reviewen
rioxxterms.freetoread.startdate2019-07-24


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