Self-heating and nonlinear current-voltage characteristics in bilayer graphene

J.K. Viljas, A. Fay, M. Wiesner, P.J. Hakonen

Research output: Contribution to journalArticleScientificpeer-review

17 Citations (Scopus)
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Abstract

We 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.
Original languageEnglish
Article number205421
Pages (from-to)1-8
Number of pages8
JournalPhysical Review B
Volume83
Issue number20
DOIs
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

Keywords

  • graphene

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