Regensburg 2010 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 42: Topical Session Multifunctional Materials III
MM 42.2: Topical Talk
Mittwoch, 24. März 2010, 15:15–15:45, H6
Interfaces in multifunctional perovskite oxides — •Christian Jooß1, Joerg Hoffmann1, Jonas Norpoth1, Malte Scherff1, Björn-Uwe Meyer1, Gesine Saucke1, and Yimei Zhu2 — 1Institute of Materials Physics, University of Goettingen, Germany — 2Center for Functional Nanomaterials, Brookhaven National Laboratory, USA
Perovskite oxide materials with strong electronic or electron-lattice correlations exhibit a fascinating variety of properties from ferroelectricity over colossal resistance effects to high-temperature superconductivity. In these materials, interfaces can have a tremendous effect on the local electronic properties. This can give rise to new interfacial phases and properties which are absent in the bulk. Often, the interfacial properties strongly depend on subtle details in the atomic structure such as chemical termination layers, octahedral tilting, strain and strain relaxing interfacial defects. Therefore, the study of interfaces in perovskite oxides is a challenging subject of materials science. Topics in this talk span from the resistive switching effect at metal-manganite interfaces in pulsed electric field over new types of solar cells with correlated pn-junction to manganite-cuprate interfaces with local variation in hole doping and correlation interactions. Based on atomically resolved structural and chemical analysis, particular emphasis will be put on the study of the mechanisms of charge transfer across interfaces in the strongly correlated electron and lattice system. We give insights that well-designed oxide hetero-interfaces show a huge potential for new applications in electronics and energy conversion.