Transient Nature of Negative Capacitance in Ferroelectric Field-Effect Transistors

TL;DR

This paper examines the transient behavior of negative capacitance in ferroelectric FETs, emphasizing the importance of time-scale characterization for practical circuit applications.

Contribution

It highlights the transient nature of negative capacitance and suggests proper time-scale analysis to determine suitable circuits for NC-FETs.

Findings

Negative capacitance is transient and time-dependent.

Proper time-scale characterization is essential for practical applications.

Implications for circuit design and device stability.

Abstract

Negative capacitance (NC) in ferroelectrics, which stems from the imperfect screening of polarization, is considered a viable approach to lower voltage operation in the field-effect transistors (FETs) used in logic switches. In this paper, we discuss the implications of the transient nature of negative capacitance for its practical application. It is suggested that the NC effect needs to be characterized at the proper time scale to identify the type of circuits where functional NC-FETs can be used effectively.