Journal Article

FZJ-2015-02581

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Determination of the electrostatic potential distribution in Pt/Fe:SrTiO$_{3}$/Nb:SrTiO$_{3}$ thin-film structures by electron holography

Marchewka, A. ; Cooper, D. ; Lenser, C.FZJ* ; Menzel, S. (Corresponding Author)FZJ* ; Du, H.FZJ* ; Dittmann, R.FZJ* ; Dunin-Borkowski, R.FZJ* ; Waser, R.FZJ*

2014
Nature Publishing Group London

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Please use a persistent id in citations: http://hdl.handle.net/2128/9096  doi:10.1038/srep06975

Abstract: We determined the electrostatic potential distribution in pristine Pt/Fe:SrTiO3/Nb:SrTiO3 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:SrTiO3/Nb:SrTiO3 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:SrTiO3 side of the bottom interface.

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Contributing Institute(s):

1. Mikrostrukturforschung (PGI-5)
2. Elektronische Materialien (PGI-7)

Research Program(s):

1. 42G - Peter Grünberg-Centre (PG-C) (POF2-42G41) (POF2-42G41)

Appears in the scientific report 2014

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Database coverage:
; ; BIOSIS Previews ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection ; Zoological Record

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