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Shot noise suppression and hopping conduction in graphene nanoribbons

Danneau, R.
Wu, F.
Tomi, M. Y.
Hakonen, P. J.
Published in Physical Review. B, Condensed Matter. 2010, vol. 82, no. 16
Abstract 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<W in our nanoribbons.
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DANNEAU, R. et al. Shot noise suppression and hopping conduction in graphene nanoribbons. In: Physical Review. B, Condensed Matter, 2010, vol. 82, n° 16. https://archive-ouverte.unige.ch/unige:35123

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Deposited on : 2014-03-31

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