Local and correlated studies of humidity-mediated ferroelectric thin film surface charge dynamics

Abstract Electrochemical phenomena in ferroelectrics are of particular interest for catalysis and sensing applications, with recent studies highlighting the combined role of the ferroelectric polarisation, applied surface voltage and overall switching history. Here, we present a systematic Kelvin pr...

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Autores principales:	Iaroslav Gaponenko, Loïc Musy, Neus Domingo, Nicolas Stucki, Albert Verdaguer, Nazanin Bassiri-Gharb, Patrycja Paruch
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765
Acceso en línea:	https://doaj.org/article/b9159b27250a4f9cb74903d8927bf38f
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spelling	oai:doaj.org-article:b9159b27250a4f9cb74903d8927bf38f2021-12-02T18:36:13ZLocal and correlated studies of humidity-mediated ferroelectric thin film surface charge dynamics10.1038/s41524-021-00615-42057-3960https://doaj.org/article/b9159b27250a4f9cb74903d8927bf38f2021-10-01T00:00:00Zhttps://doi.org/10.1038/s41524-021-00615-4https://doaj.org/toc/2057-3960Abstract Electrochemical phenomena in ferroelectrics are of particular interest for catalysis and sensing applications, with recent studies highlighting the combined role of the ferroelectric polarisation, applied surface voltage and overall switching history. Here, we present a systematic Kelvin probe microscopy study of the effect of relative humidity and polarisation switching history on the surface charge dissipation in ferroelectric Pb(Zr0.2Ti0.8)O3 thin films. We analyse the interaction of surface charges with ferroelectric domains through the framework of physically constrained unsupervised machine learning matrix factorisation, Dictionary Learning, and reveal a complex interplay of voltage-mediated physical processes underlying the observed signal decays. Additional insight into the observed behaviours is given by a Fitzhugh–Nagumo reaction–diffusion model, highlighting the lateral spread and charge passivation process contributors within the Dictionary Learning analysis.Iaroslav GaponenkoLoïc MusyNeus DomingoNicolas StuckiAlbert VerdaguerNazanin Bassiri-GharbPatrycja ParuchNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Computer softwareQA76.75-76.765ENnpj Computational Materials, Vol 7, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765 Iaroslav Gaponenko Loïc Musy Neus Domingo Nicolas Stucki Albert Verdaguer Nazanin Bassiri-Gharb Patrycja Paruch Local and correlated studies of humidity-mediated ferroelectric thin film surface charge dynamics
description	Abstract Electrochemical phenomena in ferroelectrics are of particular interest for catalysis and sensing applications, with recent studies highlighting the combined role of the ferroelectric polarisation, applied surface voltage and overall switching history. Here, we present a systematic Kelvin probe microscopy study of the effect of relative humidity and polarisation switching history on the surface charge dissipation in ferroelectric Pb(Zr0.2Ti0.8)O3 thin films. We analyse the interaction of surface charges with ferroelectric domains through the framework of physically constrained unsupervised machine learning matrix factorisation, Dictionary Learning, and reveal a complex interplay of voltage-mediated physical processes underlying the observed signal decays. Additional insight into the observed behaviours is given by a Fitzhugh–Nagumo reaction–diffusion model, highlighting the lateral spread and charge passivation process contributors within the Dictionary Learning analysis.
format	article
author	Iaroslav Gaponenko Loïc Musy Neus Domingo Nicolas Stucki Albert Verdaguer Nazanin Bassiri-Gharb Patrycja Paruch
author_facet	Iaroslav Gaponenko Loïc Musy Neus Domingo Nicolas Stucki Albert Verdaguer Nazanin Bassiri-Gharb Patrycja Paruch
author_sort	Iaroslav Gaponenko
title	Local and correlated studies of humidity-mediated ferroelectric thin film surface charge dynamics
title_short	Local and correlated studies of humidity-mediated ferroelectric thin film surface charge dynamics
title_full	Local and correlated studies of humidity-mediated ferroelectric thin film surface charge dynamics
title_fullStr	Local and correlated studies of humidity-mediated ferroelectric thin film surface charge dynamics
title_full_unstemmed	Local and correlated studies of humidity-mediated ferroelectric thin film surface charge dynamics
title_sort	local and correlated studies of humidity-mediated ferroelectric thin film surface charge dynamics
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b9159b27250a4f9cb74903d8927bf38f
work_keys_str_mv	AT iaroslavgaponenko localandcorrelatedstudiesofhumiditymediatedferroelectricthinfilmsurfacechargedynamics AT loicmusy localandcorrelatedstudiesofhumiditymediatedferroelectricthinfilmsurfacechargedynamics AT neusdomingo localandcorrelatedstudiesofhumiditymediatedferroelectricthinfilmsurfacechargedynamics AT nicolasstucki localandcorrelatedstudiesofhumiditymediatedferroelectricthinfilmsurfacechargedynamics AT albertverdaguer localandcorrelatedstudiesofhumiditymediatedferroelectricthinfilmsurfacechargedynamics AT nazaninbassirigharb localandcorrelatedstudiesofhumiditymediatedferroelectricthinfilmsurfacechargedynamics AT patrycjaparuch localandcorrelatedstudiesofhumiditymediatedferroelectricthinfilmsurfacechargedynamics
_version_	1718377882866155520

Local and correlated studies of humidity-mediated ferroelectric thin film surface charge dynamics

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