This letter investigates the definition and determination\ud
of mobility in nanometric metal–oxide–semiconductor transistors by means of multisubband Monte Carlo simulations. Our results clearly show that the transport in nano-MOSFETs, even for very small VDS, is far from being uniform and local. Consequently, the apparent mobility extracted from the experiments is\ud
a channel-length-dependent quantity, which is only partly related to the uniform transport mobility. Our study comprises both the electrical and magnetoresistance mobility