Shot noise in lithographically patterned graphene nanoribbons

Z.B. Tan, A. Puska, T. Nieminen, F. Duerr, C. Gould, LW. Molenkamp, B. Trauzettel, P.J. Hakonen

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)
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Abstract

We have investigated shot noise and conductance of multiterminal graphene nanoribbon devices at temperatures down to 50 mK. Away from the charge neutrality point, we find a Fano factor F≈0.4, nearly independent of the charge density. Our shot noise results are consistent with theoretical models for disordered graphene ribbons with a dimensionless scattering strength K0≈10 corresponding to rather strong disorder. Close to charge neutrality, an increase in F up to ∼0.7 is found, which indicates the presence of a dominant Coulomb gap possibly due to a single quantum dot in the transport gap.
Original languageEnglish
Article number245415
Pages (from-to)1-5
Number of pages5
JournalPhysical Review B
Volume88
Issue number24
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

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