Self heating and nonlinear current-voltage characteristics in bilayer graphene

Autor:	Viljas, J. K., Fay, A., Wiesner, M., Hakonen, P. J.
Rok vydání:	2011
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. B 83, 205421 (2011)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.83.205421
Popis:	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. Comment: 9 pages, 7 figures, REVTeX 4.1
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1102.0658 Zobrazit plný text záznamu View this record from Arxiv