TY  - JOUR
AU  - Marchewka, Astrid
AU  - Cooper, David
AU  - Lenser, Christian
AU  - Menzel, Stephan
AU  - Du, Hongchu
AU  - Dittmann, Regina
AU  - Dunin-Borkowski, Rafal
AU  - Waser, R.
TI  - Determination of the electrostatic potential distribution in Pt/Fe:SrTiO$_{3}$/Nb:SrTiO$_{3}$ thin-film structures by electron holography
JO  - Scientific reports
VL  - 4
SN  - 2045-2322
CY  - London
PB  - Nature Publishing Group
M1  - FZJ-2015-02581
SP  - 6975 
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000344759200002
DO  - DOI:10.1038/srep06975
UR  - https://juser.fz-juelich.de/record/189414
ER  -