%0 Journal Article
%A Marchewka, Astrid
%A Cooper, David
%A Lenser, Christian
%A Menzel, Stephan
%A Du, Hongchu
%A Dittmann, Regina
%A Dunin-Borkowski, Rafal
%A Waser, R.
%T Determination of the electrostatic potential distribution in Pt/Fe:SrTiO$_{3}$/Nb:SrTiO$_{3}$ thin-film structures by electron holography
%J Scientific reports
%V 4
%@ 2045-2322
%C London
%I Nature Publishing Group
%M FZJ-2015-02581
%P 6975 
%D 2014
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000344759200002
%R 10.1038/srep06975
%U https://juser.fz-juelich.de/record/189414