– 17 –
Fig. 4. Measurements on a graphene sample with W/L = 24: (a) Resistance R (left axis) and conductivity (right axis) as a function of Vgate. (b) Differential resistance dV/dI versus bias voltage Vbias at the Dirac point (red curve) and at high density (blue curve). (c) Current noise per unit bandwidth SI as a function of bias at the Dirac point, at T = 8.5 K, fitted (red curve) using Khlus formula ( = 0.318). Note that the low bias data are perfectly fitted as well as the high bias (d) Mapping of the average Fano factor F as a function of gate voltage Vgate and bias voltage Vbias at T = 8.5 K.
Annual Report 2007