Negative capacitance tunnel F£Ts: Experimental demonstration of outstanding simultaneous boosting of on-current, transconductance, overdrive, and swing

Abstract

This paper demonstrates and experimentally reports the highest ever performance boosting in strained silicon-nanowire homojunction TFETs with negative capacitance, provided by matched PZT capacitors. Outstanding enhancements of Ion, gm, and overdrive are analyzed and explained by most effective reduction of body factor, m < 1, especially for Vg>Vt, which greatly amplify the control on the surface potential TFET, which dictates a highly non-linear BTBT regime. We achieve a full non-hysteretic negative-capacitance switch configuration, suitable for logic applications, and report o«-current increase by a factor of 500x, voltage overdrive of IV, transconductance increase of up to 5× 103x, and subthreshold swing improvement.