Revised analysis of negative capacitance in ferroelectric-insulator capacitors

Analytical and numerical results, physical insight, comparison to experiments

Conference Paper (2019)
Author(s)

T. Rollo (Università degli Studi di Udine)

Franco Bianchini (Università degli Studi di Udine)

G. Giordano (TU Delft - Team Tamas Keviczky)

R. Specogna (Università degli Studi di Udine)

D. Esseni (Università degli Studi di Udine)

Research Group
Team Tamas Keviczky
DOI related publication
https://doi.org/10.1109/IEDM19573.2019.8993436
More Info
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Publication Year
2019
Language
English
Research Group
Team Tamas Keviczky
ISBN (electronic)
978-1-7281-4031-5

Abstract

We present a revised analysis of Negative Capacitance (NC) in ferroelectric-insulator capacitors, and particularly of the difference between systems with and without a metal interlayer. We develop a model accounting for the three-dimensional electrostatics and report analytical and numerical results based on Landau-Ginzburg equations. Our results explain the lack of NC operation in capacitors having an interlayer metal, compare well with recent experiments and enlighten the role of traps at the ferroelectric-oxide interface.

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