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Revised analysis of negative capacitance in ferroelectric-insulator capacitors

Analytical and numerical results, physical insight, comparison to experiments

Conference paper (2019)

Authors

T. Rollo Università degli Studi di Udine
Franco Blanchini Università degli Studi di Udine
Giulia Giordano Team Tamas Keviczky
R. Specogna Università degli Studi di Udine
D. Esseni Università degli Studi di Udine
Research Group
Team Tamas Keviczky
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Published Date

2019

Language

English

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Research Group

Team Tamas Keviczky

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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