Shot noise in lithographically patterned graphene nanoribbons
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© 2013 American Physical Society (APS). This is the accepted version of the following article: Tan, Z. B. & Puska, A. & Nieminen, T. & Duerr, F. & Gould, C. & Molenkamp, L. W. & Trauzettel, B. & Hakonen, Pertti J. 2013. Shot noise in lithographically patterned graphene nanoribbons. Physical Review B. Volume 88, Issue 24. 245415/1-5. ISSN 1550-235X (electronic). ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.88.245415, which has been published in final form at http://journals.aps.org/prb/abstract/10.1103/PhysRevB.88.245415.
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School of Science |
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2013
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Mcode
Degree programme
Language
en
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245415/1-5
Series
Physical Review B, Volume 88, Issue 24
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.Description
Keywords
conductance, disorder, transport
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Citation
Tan, Z. B. & Puska, A. & Nieminen, T. & Duerr, F. & Gould, C. & Molenkamp, L. W. & Trauzettel, B. & Hakonen, Pertti J. 2013. Shot noise in lithographically patterned graphene nanoribbons. Physical Review B. Volume 88, Issue 24. 245415/1-5. ISSN 1550-235X (electronic). ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.88.245415