Accurate compact nonlinear dynamical model for a volatile ferroelectric ZrO2 capacitor

We have measured the dynamical response of ZrO2 capacitors to applied triangular voltage waveforms with varying frequencies and amplitudes to determine the voltage and charge on the devices as a function of time. We have fit our experimental results to a Landau–Khalatnikov dynamical equation with a sixth order Landau–Ginzburg–Devonshire polynomial to represent the static charge-voltage behavior, and obtained coefficients of determination R2 > 0.99 for the fits. Analysis of the resulting quantitative model reveals an extremely small range of negative differential capacitance <16 mV. The hysteresis loops in the dynamical charge-voltage curves are found to result primarily from energy loss during the ferroelectric transitions, as represented by a frequency-dependent series resistance in the model.

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Publication Details

Journal
npj Unconventional Computing
Published
2024-09-02
DOI
https://doi.org/10.1038/s44335-024-00007-z
Citations
4
Primary Topic
Ferroelectric and Negative Capacitance Devices
Type
article
Field-Weighted Citation Impact
0.83

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article

Accurate compact nonlinear dynamical model for a volatile ferroelectric ZrO2 capacitor

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npj Unconventional Computing
Ferroelectric and Negative Capacitance Devices
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article

Accurate compact nonlinear dynamical model for a volatile ferroelectric ZrO2 capacitor

Taehwan Moon, James Nicolas Pagaduan, K. Mahalingam, Qiangfei Xia, J. Joshua Yang, Reika Katsumata, Kurt G. Eyink, Shiva Asapu, Richard Stanley Williams, Sabyasachi Ganguli, Ruoyu Zhao
article en
4 citations

Abstract

We have measured the dynamical response of ZrO2 capacitors to applied triangular voltage waveforms with varying frequencies and amplitudes to determine the voltage and charge on the devices as a function of time. We have fit our experimental results to a Landau–Khalatnikov dynamical equation with a sixth order Landau–Ginzburg–Devonshire polynomial to represent the static charge-voltage behavior, and obtained coefficients of determination R2 > 0.99 for the fits. Analysis of the resulting quantitative model reveals an extremely small range of negative differential capacitance <16 mV. The hysteresis loops in the dynamical charge-voltage curves are found to result primarily from energy loss during the ferroelectric transitions, as represented by a frequency-dependent series resistance in the model.

npj Unconventional ComputingVol. 1(1)
University of Southern California (US), University of Massachusetts Amherst (US), Wright-Patterson Air Force Base (US), Texas A&M University (US)
National Science Foundation, U.S. Air Force, Multidisciplinary University Research Initiative, Air Force Office of Scientific Research, Air Force Research Laboratory
Affordable and clean energy
Openalex Percentile: Top 27%
Ferroelectric and Negative Capacitance Devices
0.83
DOIOpen Access PDFOpenAlex
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