The combined effects of halo and linear doping effects on the high-frequency and switching performance in ballistic CNTFETs

To overcome short-channel effects (SCEs) in high-performance device applications, a novel structure of CNTFET with a combination of halo and linear doping structure (HL-CNTFET) has been proposed. It has been theoretically investigated by a quantum kinetic model, which is based on two-dimensional non-equilibrium Green's functions solved self-consistently with Poisson's equations. We have studied the effect of halo doping and linear doping structure on static and dynamical performances of HL-CNTFET. It is demonstrated that a halo doping structure can decrease the drain leakage current and improve the on/off current ratio, and that linear doping can improve high-frequency and switching performance.