Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 2: Multiferroics 1 (jointly wth DF,DS,KR,TT)
MA 2.6: Vortrag
Montag, 11. März 2013, 10:45–11:00, H3
Role of electron correlation of FeO at Fe/ferroelectric oxide/Fe interface for magnetic transport properties — •Andrea Neroni, Daniel Wortmann, Ersoy Sasioglu, Stefan Blügel, and Marjana Ležaić — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany
Fe/ferroelectric oxide/Fe is a nanoferronic tunnel junction with exciting electronic magneto-conductive
transport properties.
FeO layers at the interface of Fe/oxide/Fe barriers seems to significantly alter these properties as indicated by several experiments.
In order to understand the role of electron correlations in FeO at the interface on the tunneling properties of a Fe/BaTiO3/Fe barrier we use an
embedded Green-function approach [1] implemented within the framework of the
full-potential linearized augmented plane-wave
(FLAPW) method FLEUR [2].
Conductances are obtained for different oxidation conditions and for different magnetic configurations of the contacts.
Strong correlations are taken into account employing the LDA+U approach within the framework of the density functional
theory (DFT) with a Hubbard U parameter determined by constrained random phase approximation (cRPA) [3].
Work is supported by Helmholtz Young Investigators Group Program VH-NG-409.
www.flapw.de
D. Wortmann, H. Ishida, and S. Blügel, PRB 65, 165103 (2002)
E. Şaşioğlu, C. Friedrich, and S. Blügel, PRB 83, 121101(R) (2011)