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The large spectrum of perovskite oxides provides virtually unlimited possibilities to design and fabricate interfaces with functional properties. The ability to produce clean and sharp interfaces between oxide materials in a controlled manner provides appealing possibilities to generate novel electronic phases. Crucial steps in achieving high quality epitaxial oxide heterostructures have been the use of pulsed-laser deposition and molecular-beam epitaxy for the growth of multicomponent oxides, the ability to terminate oxide substrates at well-defined ionic planes, and the development of high pressure reflection high-energy electron diffraction to monitor the deposition of individual atomic layers. In consequence now epitaxial perovskite heterostructures can be fabricated with atomic-layer precision. In my presentation I will show examples of physical properties of epitaxial oxide heterostructures I have fabricated by pulsed-laser deposition. The emphasis will be on justifying the choice of the perovskite oxides that were interfaced (ferromagnetic manganites and ruthenates and ferroelectrics) and on the role of the interfaces, and their quality, in establishing the physical properties of these particular heterostructures.

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Ionela Vrejoiu, MPI for Solid State Research, Stuttgart
Seminar Room of the Institute of Physics II
Contact: Markus Grüninger