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Tunable carrier multiplication and cooling in graphene

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dc.contributor.authorJohannsen, J.C.
dc.contributor.authorUlstrup, S.
dc.contributor.authorCrepaldi, A.
dc.contributor.authorCilento, F.
dc.contributor.authorZacchigna, M.
dc.contributor.authorMiwa, J.A.
dc.contributor.authorCacho, C.
dc.contributor.authorChapman, R.T.
dc.contributor.authorSpringate, E.
dc.contributor.authorFromm, F.
dc.contributor.authorRaidel, C.
dc.contributor.authorSeyller, T.
dc.contributor.authorKing, Phil
dc.contributor.authorParmigiani, F.
dc.contributor.authorGrioni, M.
dc.contributor.authorHofmann, P.
dc.date.accessioned2015-12-02T00:11:39Z
dc.date.available2015-12-02T00:11:39Z
dc.date.issued2015-01-14
dc.identifier163955264
dc.identifier18f4eb23-b05b-4136-86bc-b9d76f8e1744
dc.identifier84920991881
dc.identifier000348086100052
dc.identifier25458168
dc.identifier.citationJohannsen , J C , Ulstrup , S , Crepaldi , A , Cilento , F , Zacchigna , M , Miwa , J A , Cacho , C , Chapman , R T , Springate , E , Fromm , F , Raidel , C , Seyller , T , King , P , Parmigiani , F , Grioni , M & Hofmann , P 2015 , ' Tunable carrier multiplication and cooling in graphene ' , Nano Letters , vol. 15 , no. 1 , pp. 326-331 . https://doi.org/10.1021/nl503614ven
dc.identifier.issn1530-6984
dc.identifier.urihttps://hdl.handle.net/10023/7878
dc.descriptionThe authors acknowledge financial support from the VILLUM foundation, The Danish Council for Independent Research, the Lundbeck Foundation, the Swiss National Science Foundation (NSF), EPSRC, The Royal Society and the Italian Ministry of University and Research (Grants No. FIRBRBAP045JF2 and No. FIRB-RBAP06AWK3).en
dc.description.abstractTime- and angle-resolved photoemission measurements on two doped graphene samples displaying different doping levels reveal remarkable differences in the ultrafast dynamics of the hot carriers in the Dirac cone. In the more strongly (n-)doped graphene, we observe larger carrier multiplication factors (>3) and a significantly faster phonon-mediated cooling of the carriers back to equilibrium compared to in the less (p-)doped graphene. These results suggest that a careful tuning of the doping level allows for an effective manipulation of graphene's dynamical response to a photoexcitation.
dc.format.extent6
dc.format.extent2281276
dc.language.isoeng
dc.relation.ispartofNano Lettersen
dc.subjectEpitaxial grapheneen
dc.subjectHot carrier dynamicsen
dc.subjectCharge carrier tunabilityen
dc.subjectCarrier multiplicationen
dc.subjectTime-resolved ARPESen
dc.subjectQC Physicsen
dc.subjectNDASen
dc.subject.lccQCen
dc.titleTunable carrier multiplication and cooling in grapheneen
dc.typeJournal articleen
dc.contributor.sponsorThe Royal Societyen
dc.contributor.sponsorEPSRCen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.identifier.doihttps://doi.org/10.1021/nl503614v
dc.description.statusPeer revieweden
dc.date.embargoedUntil2015-12-02
dc.identifier.urlhttp://pubs.acs.org/doi/suppl/10.1021/nl503614ven
dc.identifier.grantnumberUF120096en
dc.identifier.grantnumberEP/I031014/1en


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