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Energy relaxation in graphene and its measurement with supercurrent

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Voutilainen, J.
dc.contributor.author Fay, A.
dc.contributor.author Häkkinen, P.
dc.contributor.author Viljas, J. K.
dc.contributor.author Heikkilä, T. T.
dc.contributor.author Hakonen, Pertti J.
dc.date.accessioned 2015-09-04T10:15:16Z
dc.date.available 2015-09-04T10:15:16Z
dc.date.issued 2011
dc.identifier.citation 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 en
dc.identifier.issn 1098-0121 (printed)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/17616
dc.description.abstract We 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.format.extent 045419/1-10
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Physical Society (APS) en
dc.relation.ispartofseries Physical Review B en
dc.relation.ispartofseries Volume 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.subject.other Physics en
dc.title Energy relaxation in graphene and its measurement with supercurrent en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.rights.holder American Physical Society (APS)
dc.contributor.school Perustieteiden korkeakoulu fi
dc.contributor.school School of Science en
dc.contributor.department Teknillisen fysiikan laitos fi
dc.contributor.department Department of Applied Physics en
dc.subject.keyword quasi-particles en
dc.subject.keyword transport en
dc.subject.keyword metals en
dc.identifier.urn URN:NBN:fi:aalto-201509034231
dc.type.dcmitype text en
dc.identifier.doi 10.1103/physrevb.84.045419
dc.type.version Final published version en


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