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Contact doping, Klein tunneling, and asymmetry of shot noise in suspended graphene

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Laitinen, Antti
dc.contributor.author Paraoanu, G. S.
dc.contributor.author Oksanen, Mika
dc.contributor.author Craciun, Monica F.
dc.contributor.author Russo, Saverio
dc.contributor.author Sonin, Edouard
dc.contributor.author Hakonen, Pertti
dc.date.accessioned 2016-09-16T10:03:07Z
dc.date.issued 2016-03-09
dc.identifier.citation Laitinen , A , Paraoanu , G S , Oksanen , M , Craciun , M F , Russo , S , Sonin , E & Hakonen , P 2016 , ' Contact doping, Klein tunneling, and asymmetry of shot noise in suspended graphene ' , Physical Review B , vol. 93 , no. 11 , 115413 , pp. 1-14 . https://doi.org/10.1103/PhysRevB.93.115413 en
dc.identifier.issn 1098-0121
dc.identifier.issn 1550-235X
dc.identifier.other PURE UUID: 9f8d75d3-7999-4c45-86b1-9232940a122f
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/contact-doping-klein-tunneling-and-asymmetry-of-shot-noise-in-suspended-graphene(9f8d75d3-7999-4c45-86b1-9232940a122f).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=84960863380&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/4318291/PhysRevB.93.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/22043
dc.description.abstract The inherent asymmetry of the electric transport in graphene is attributed to Klein tunneling across barriers defined by pn interfaces between positively and negatively charged regions. By combining conductance and shot noise experiments, we determine the main characteristics of the tunneling barrier (height and slope) in a high-quality suspended sample with Au/Cr/Au contacts. We observe an asymmetric resistance Rodd=100-70Ω across the Dirac point of the suspended graphene at carrier density |nG|=(0.3-4)×1011cm-2, while the Fano factor displays a nonmonotonic asymmetry in the range Fodd∼0.03-0.1. Our findings agree with analytical calculations based on the Dirac equation with a trapezoidal barrier. Comparison between the model and the data yields the barrier height for tunneling, an estimate of the thickness of the pn interface d en
dc.format.extent 1-14
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries PHYSICAL REVIEW B en
dc.relation.ispartofseries Volume 93, issue 11 en
dc.rights openAccess en
dc.title Contact doping, Klein tunneling, and asymmetry of shot noise in suspended graphene en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Applied Physics
dc.contributor.department University of Exeter
dc.contributor.department Hebrew University of Jerusalem
dc.identifier.urn URN:NBN:fi:aalto-201609163925
dc.identifier.doi 10.1103/PhysRevB.93.115413
dc.type.version publishedVersion


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