Enhanced shot noise in carbon nanotube field-effect transistors

Betti, A.; Fiori, G.; Iannaccone, G.
December 2009
Applied Physics Letters;12/21/2009, Vol. 95 Issue 25, p252108
Academic Journal
We predict shot noise enhancement in defect-free carbon nanotube field-effect transistors through a numerical investigation based on the self-consistent solution of the Poisson and Schrödinger equations within the nonequilibrium Green’s functions formalism, and on a Monte Carlo approach to reproduce injection statistics. Noise enhancement is due to the correlation between trapping of holes from the drain into quasibound states in the channel and thermionic injection of electrons from the source, and can lead to an appreciable Fano factor of 1.22 at room temperature.


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