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Shot noise suppression and hopping conduction in graphene nanoribbons

R. Danneau ; Fang Wu ; M. Y. Tomi ; J. B. Oostinga ; A. F. Morpurgo ; P. J. Hakonen
Physical Review B (1098-0121). Vol. 82 (2010), 16,
[Artikel, refereegranskad vetenskaplig]

We have investigated shot noise and conduction of graphene field-effect nanoribbon devices at low temperature. By analyzing the exponential I-V characteristics of our devices in the transport gap region, we found out that transport follows variable range hopping laws at intermediate bias voltages 1< Vbias <12 mV. In parallel, we observe a strong shot noise suppression leading to very low Fano factors. The strong suppression of shot noise is consistent with inelastic hopping, in crossover from one- to two-dimensional regime, indicating that the localization length lloc


Article Number: 161405



Denna post skapades 2011-04-20. Senast ändrad 2016-11-30.
CPL Pubid: 139505

 

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