Abstract
A quantum ballistic model for cylindrical nanowire MOSFETs operating in the subthreshold regime is presented. For subthreshold conditions, we have assumed that the electrostatics is dominated by the inter-electrode capacitive coupling between the body electrodes. Hence, the charge is neglected in Poisson's equation, thus decoupling the quantum effects and the electrostatics in the body. Assuming cylindrical symmetry, the body potential can be obtained to a good precision by considering a 2D solution of the Laplace equation for the symmetry plane containing the cylinder axis. For this, a suitable geometric transformation is needed to account for the added gate control associated with a cylindrical gate.
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