Figure 1

Figure 1: Schematic diagram of the cross-section of a GFET device. The virtual electron source (VES) point and the virtual hole source (VHS) point in the channel are defined for a GFET. The electrostatic potential along the channel and the position of VES and VHS are shown for a GFET operating in the three operating regions: I. Electron conduction region; II. Ambipolar region; III. Hole conduction region.