Energy relaxation in graphene and its measurement with supercurrent

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorVoutilainen, J.
dc.contributor.authorFay, A.
dc.contributor.authorHäkkinen, P.
dc.contributor.authorViljas, J. K.
dc.contributor.authorHeikkilä, T. T.
dc.contributor.authorHakonen, Pertti J.
dc.contributor.departmentTeknillisen fysiikan laitosfi
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.schoolPerustieteiden korkeakoulufi
dc.contributor.schoolSchool of Scienceen
dc.date.accessioned2015-09-04T10:15:16Z
dc.date.available2015-09-04T10:15:16Z
dc.date.issued2011
dc.description.abstractWe study inelastic energy relaxation in graphene for low energies to find out how electrons scatter with acoustic phonons and other electrons. By coupling the graphene to superconductors, we create a strong dependence of the measured signal, i.e., critical Josephson current, on the electron population on different energy states. Since the relative population of high- and low-energy states is determined by the inelastic scattering processes, the critical current becomes an effective probe for their strength. We argue that the electron-electron interaction is the dominant relaxation method and we estimate a scattering time τe−e=0.1…1 ps at T=500 mK, 1-2 orders of magnitude smaller than predicted for normal two-dimensional diffusive systems.en
dc.description.versionPeer revieweden
dc.format.extent045419/1-10
dc.format.mimetypeapplication/pdfen
dc.identifier.citationVoutilainen, J. & Fay, A. & Häkkinen, P. & Viljas, J. K. & Heikkilä, T. T. & Hakonen, Pertti J. 2011. Energy relaxation in graphene and its measurement with supercurrent. Physical Review B. Volume 84, Issue 4. 045419/1-10. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.84.045419en
dc.identifier.doi10.1103/physrevb.84.045419
dc.identifier.issn1098-0121 (printed)
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/17616
dc.identifier.urnURN:NBN:fi:aalto-201509034231
dc.language.isoenen
dc.publisherAmerican Physical Society (APS)en
dc.relation.ispartofseriesPhysical Review Ben
dc.relation.ispartofseriesVolume 84, Issue 4
dc.rights© 2011 American Physical Society (APS). This is the accepted version of the following article: Voutilainen, J. & Fay, A. & Häkkinen, P. & Viljas, J. K. & Heikkilä, T. T. & Hakonen, Pertti J. 2011. Energy relaxation in graphene and its measurement with supercurrent. Physical Review B. Volume 84, Issue 4. 045419/1-10. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.84.045419, which has been published in final form at http://journals.aps.org/prb/abstract/10.1103/PhysRevB.84.045419.en
dc.rights.holderAmerican Physical Society (APS)
dc.subject.keywordquasi-particlesen
dc.subject.keywordtransporten
dc.subject.keywordmetalsen
dc.subject.otherPhysicsen
dc.titleEnergy relaxation in graphene and its measurement with supercurrenten
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.dcmitypetexten
dc.type.versionFinal published versionen
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