Self-heating and nonlinear current-voltage characteristics in bilayer graphene
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Physical Review B, Volume 83, Issue 20
AbstractWe demonstrate by experiments and numerical simulations that the low-temperature current-voltage characteristics in diffusive bilayer graphene (BLG) exhibit a strong superlinearity at finite bias voltages. The superlinearity is weakly dependent on doping and on the length of the graphene sample. This effect can be understood as a result of Joule heating. It is stronger in BLG than in monolayer graphene (MLG), since the conductivity of BLG is more sensitive to temperature due to the higher density of electronic states at the Dirac point.
graphene, BLG, superlinearity
Viljas, J. K. & Fay, A. & Wiesner, M. & Hakonen, Pertti J. 2011. Self-heating and nonlinear current-voltage characteristics in bilayer graphene. Physical Review B. Volume 83, Issue 20. 205421/1-8. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.83.205421