Shot Noise in Lithographically Patterned Graphene Nanoribbons
We have investigated shot noise and conductance of multi-terminal graphene nanoribbon devices at temperatures down to 50 mK. Away from the charge neutrality point, we find a Fano factor \(F \approx 0.4\), nearly independent of the charge density. Our shot noise results are consistent with theoretica...
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| creator | Tan, Z B Puska, A Nieminen, T Duerr, F Gould, C Molenkamp, L W Trauzettel, B Hakonen, P J |
| description | We have investigated shot noise and conductance of multi-terminal graphene nanoribbon devices at temperatures down to 50 mK. Away from the charge neutrality point, we find a Fano factor \(F \approx 0.4\), nearly independent of the charge density. Our shot noise results are consistent with theoretical models for disordered graphene ribbons with a dimensionless scattering strength \(K_0 \approx 10\) corresponding to rather strong disorder. Close to charge neutrality, an increase in \(F\) up to \(\sim 0.7\) is found, which indicates the presence of a dominant Coulomb gap possibly due to a single quantum dot in the transport gap. |
| doi_str_mv | 10.48550/arxiv.1308.5947 |
| format | Article |
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| subjects | Charge density Electrons Graphene Nanoribbons Noise Physics - Mesoscale and Nanoscale Physics Quantum dots Resistance Shot noise |
| title | Shot Noise in Lithographically Patterned Graphene Nanoribbons |
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