Determination of the electrostatic potential distribution in Pt/Fe:SrTiO(3)/Nb:SrTiO(3) thin-film structures by electron holography

We determined the electrostatic potential distribution in pristine Pt/Fe:SrTiO(3)/Nb:SrTiO(3) structures by electron holography experiments, revealing the existence of a depletion layer extending into the Nb-doped bottom electrode. Simulations of potential profiles in metal-insulator-metal structure...

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Autores principales: Marchewka, Astrid, Cooper, David, Lenser, Christian, Menzel, Stephan, Du, Hongchu, Dittmann, Regina, Dunin-Borkowski, Rafal E., Waser, Rainer
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4225551/
https://www.ncbi.nlm.nih.gov/pubmed/25381733
http://dx.doi.org/10.1038/srep06975
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author Marchewka, Astrid
Cooper, David
Lenser, Christian
Menzel, Stephan
Du, Hongchu
Dittmann, Regina
Dunin-Borkowski, Rafal E.
Waser, Rainer
author_facet Marchewka, Astrid
Cooper, David
Lenser, Christian
Menzel, Stephan
Du, Hongchu
Dittmann, Regina
Dunin-Borkowski, Rafal E.
Waser, Rainer
author_sort Marchewka, Astrid
collection PubMed
description We determined the electrostatic potential distribution in pristine Pt/Fe:SrTiO(3)/Nb:SrTiO(3) structures by electron holography experiments, revealing the existence of a depletion layer extending into the Nb-doped bottom electrode. Simulations of potential profiles in metal-insulator-metal structures were conducted assuming different types and distributions of dopants. It is found that the presence of acceptor-type dopant concentrations at the Fe:SrTiO(3)/Nb:SrTiO(3) interface with a donor-doped insulating layer provides a good match to the measured profile. Such acceptor-type interface concentrations may be associated with Sr vacancies on the Nb:SrTiO(3) side of the bottom interface.
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spelling pubmed-42255512014-11-17 Determination of the electrostatic potential distribution in Pt/Fe:SrTiO(3)/Nb:SrTiO(3) thin-film structures by electron holography Marchewka, Astrid Cooper, David Lenser, Christian Menzel, Stephan Du, Hongchu Dittmann, Regina Dunin-Borkowski, Rafal E. Waser, Rainer Sci Rep Article We determined the electrostatic potential distribution in pristine Pt/Fe:SrTiO(3)/Nb:SrTiO(3) structures by electron holography experiments, revealing the existence of a depletion layer extending into the Nb-doped bottom electrode. Simulations of potential profiles in metal-insulator-metal structures were conducted assuming different types and distributions of dopants. It is found that the presence of acceptor-type dopant concentrations at the Fe:SrTiO(3)/Nb:SrTiO(3) interface with a donor-doped insulating layer provides a good match to the measured profile. Such acceptor-type interface concentrations may be associated with Sr vacancies on the Nb:SrTiO(3) side of the bottom interface. Nature Publishing Group 2014-11-10 /pmc/articles/PMC4225551/ /pubmed/25381733 http://dx.doi.org/10.1038/srep06975 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Marchewka, Astrid
Cooper, David
Lenser, Christian
Menzel, Stephan
Du, Hongchu
Dittmann, Regina
Dunin-Borkowski, Rafal E.
Waser, Rainer
Determination of the electrostatic potential distribution in Pt/Fe:SrTiO(3)/Nb:SrTiO(3) thin-film structures by electron holography
title Determination of the electrostatic potential distribution in Pt/Fe:SrTiO(3)/Nb:SrTiO(3) thin-film structures by electron holography
title_full Determination of the electrostatic potential distribution in Pt/Fe:SrTiO(3)/Nb:SrTiO(3) thin-film structures by electron holography
title_fullStr Determination of the electrostatic potential distribution in Pt/Fe:SrTiO(3)/Nb:SrTiO(3) thin-film structures by electron holography
title_full_unstemmed Determination of the electrostatic potential distribution in Pt/Fe:SrTiO(3)/Nb:SrTiO(3) thin-film structures by electron holography
title_short Determination of the electrostatic potential distribution in Pt/Fe:SrTiO(3)/Nb:SrTiO(3) thin-film structures by electron holography
title_sort determination of the electrostatic potential distribution in pt/fe:srtio(3)/nb:srtio(3) thin-film structures by electron holography
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4225551/
https://www.ncbi.nlm.nih.gov/pubmed/25381733
http://dx.doi.org/10.1038/srep06975
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