I. Meric, N. Baklitskaya, P. Kim, and K. L. Shepard, “RF performance of top-gated, zero-bandgap graphene field-effect transistors,” International Electron Devices Meeting, 2008.

We present the first experimental high-frequency measurements of graphene field-effect transistors (GFETs), demonstrating an fT of 14.7 GHz for a 500-nm-length device. We also present detailed measurement and analysis of velocity saturation in GFETs, demonstrating the potential for velocities approaching 108 cm/sec and the effect of an ambipolar channel on current-voltage characteristics.