Positive non-linear capacitance: the origin of the steep subthreshold-slope in ferroelectric FETs

We show that the non-linear positive capacitance (PC) of ferroelectrics (FE) can explain the steep subthreshold-slope (SS) observed in FE based MOSFETs and often attributed to the existence of a negative capacitance in FE capacitors. Physically attainable and unattainable regions of the S-shape curv...

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Autores principales: Alam, Md Nur K., Roussel, P., Heyns, M., Van Houdt, J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6802213/
https://www.ncbi.nlm.nih.gov/pubmed/31628404
http://dx.doi.org/10.1038/s41598-019-51237-2
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author Alam, Md Nur K.
Roussel, P.
Heyns, M.
Van Houdt, J.
author_facet Alam, Md Nur K.
Roussel, P.
Heyns, M.
Van Houdt, J.
author_sort Alam, Md Nur K.
collection PubMed
description We show that the non-linear positive capacitance (PC) of ferroelectrics (FE) can explain the steep subthreshold-slope (SS) observed in FE based MOSFETs and often attributed to the existence of a negative capacitance in FE capacitors. Physically attainable and unattainable regions of the S-shape curve used in the negative capacitance theory are investigated by self-consistently solving Landau-Khalatnikov and Maxwell equations and by experimental validation. Finally, the conditions for attaining a steep SS in FE based MOSFETs assuming only positive capacitances are discussed.
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spelling pubmed-68022132019-10-24 Positive non-linear capacitance: the origin of the steep subthreshold-slope in ferroelectric FETs Alam, Md Nur K. Roussel, P. Heyns, M. Van Houdt, J. Sci Rep Article We show that the non-linear positive capacitance (PC) of ferroelectrics (FE) can explain the steep subthreshold-slope (SS) observed in FE based MOSFETs and often attributed to the existence of a negative capacitance in FE capacitors. Physically attainable and unattainable regions of the S-shape curve used in the negative capacitance theory are investigated by self-consistently solving Landau-Khalatnikov and Maxwell equations and by experimental validation. Finally, the conditions for attaining a steep SS in FE based MOSFETs assuming only positive capacitances are discussed. Nature Publishing Group UK 2019-10-18 /pmc/articles/PMC6802213/ /pubmed/31628404 http://dx.doi.org/10.1038/s41598-019-51237-2 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Alam, Md Nur K.
Roussel, P.
Heyns, M.
Van Houdt, J.
Positive non-linear capacitance: the origin of the steep subthreshold-slope in ferroelectric FETs
title Positive non-linear capacitance: the origin of the steep subthreshold-slope in ferroelectric FETs
title_full Positive non-linear capacitance: the origin of the steep subthreshold-slope in ferroelectric FETs
title_fullStr Positive non-linear capacitance: the origin of the steep subthreshold-slope in ferroelectric FETs
title_full_unstemmed Positive non-linear capacitance: the origin of the steep subthreshold-slope in ferroelectric FETs
title_short Positive non-linear capacitance: the origin of the steep subthreshold-slope in ferroelectric FETs
title_sort positive non-linear capacitance: the origin of the steep subthreshold-slope in ferroelectric fets
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6802213/
https://www.ncbi.nlm.nih.gov/pubmed/31628404
http://dx.doi.org/10.1038/s41598-019-51237-2
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