Reversible current blockade of carbon nanotube through well resolved multitrap-interactions*

We report the observation of a new kind of multiple-trap random telegraph signal (RTS) in the electronic transport of a carbon nanotube field effect transistor at room temperature. RTS from one charge trap precedes a transition to strong current blockade continues over a well-defined bias window, and subsequently reverses to unblock through a separate RTS series arising from a second, adjacent trap thru pure electrostatic interaction. Our results suggest that multiple-trap behavior in low-dimensional field-effect devices may be adaptable for several new transistor and sensor technologies.