Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 59: Low-Dimensional Systems: Poster Session

TT 59.22: Poster

Mittwoch, 9. März 2016, 15:00–18:30, Poster D

Correlated Electronic Properties of Different SrIrO₃/SrTiO₃ Heterostructures — •Gernot J. Kraberger and Markus Aichhorn — Institute of Theoretical and Computational Physics, NAWI Graz, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria

Strontium iridates are materials that combine strong electronic correlations with pronounced spin-orbit coupling, giving rise to fascinating physical properties. Strategies to purposefully influence and design these materials are a crucial step to further advance this field. A highly promising candidate for achieving this goal is the formation of heterostructures with other materials. Motivated by this quest, we perform calculations within the DFT+DMFT framework to investigate how the geometry of heterostructures of perovskite SrIrO₃ with SrTiO₃ influences their correlated electronic structure. We explore the differences between (001)- and (111)-stacked heterostructures, where the latter are particularly interesting because they form buckled honeycomb lattices that have non-trivial topological properties. For the (001)-heterostructures the effect of varying the thickness of the SrIrO₃ layers, and thus their effective dimensionality, are studied. As an important ingredient we have to consider the effect of lattice distortions – in the form of a rotation of the oxygen cages – on the electronic correlations. We argue how the interplay of all these factors together allows a targeted modification of the electronic properties of the material.