Transmission Engineering as a Route to Subthermal Switching

A. W. Ghosh , IEEE Journal of the Electron Devices Society , 3 (3) :135-143 (2015).
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The physics of low subthreshold devices is interpreted in terms of a gate-dependent change in their mode-averaged transmission function, in addition to a capacitive shift in their overall mode spectrum. Accordingly, we explore a variety of subthermal switches that alter the bandwidth, bandgap or amplitude of the transmission, and combinations thereof. The Landauer theory for current flow provides a convenient way to derive the subthreshold swing in each case analytically and suggests ways to beat the Boltzmann limit.