Shot noise suppression and hopping conduction in graphene nanoribbons

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2010
Major/Subject
Mcode
Degree programme
Language
en
Pages
161405/1-4
Series
Physical Review B, Volume 82, Issue 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.
Description
Keywords
noise processes, phenomena
Other note
Citation
Danneau, R. & Wu, F. & Tomi, M. Y. & Oostinga, J. B. & Morpurgo, A. F. & Hakonen, Pertti J. 2010. Shot noise suppression and hopping conduction in graphene nanoribbons. Physical Review B. Volume 82, Issue 16. 161405/1-4. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.82.161405