Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 59: Low-Dimensional Systems: Poster Session

TT 59.16: Poster

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

Profiling the interfacial electron gas of LaAlO₃/SrTiO₃(111) Heterointerfaces — •Judith Gabel¹, Michael Zapf¹, Philipp Scheiderer¹, Philipp Schütz¹, Ozan Kirilmaz¹, Christoph Schlueter², Tien-Lin Lee², Claudia Cancellieri³, Victor Rogalev^1,4, Vladimir Strocov⁴, Michael Sing¹, and Ralph Claessen¹ — ¹Physikalisches Institut and Röntgen Center for Complex Material Systems (RCCM), Universität Würzburg, Germany — ²Diamond Light Source Ltd., Didcot, United Kingdom — ³EMPA, Laboratory of Joining Technologies and Corrosion, Duebendorf, Switzerland — ⁴Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland

Akin to the the well established LaAlO₃(LAO)/SrTiO₃(STO) (001) a two-dimensional electron system (2DES) also forms at the interface between LAO and STO in (111) orientation. In contrast to the (001) samples, the (111) oriented structures are predicted to display highly non-trivial topological properties induced by symmetry breaking and the peculiar real space lattice topology. We have investigated the electronic structure of the LAO/STO (111) heterostructure by hard and resonant soft X-ray photoemission. The momentum-resolved electronic structure of the interface Ti 3d states showcases the distinctive symmetry of the (111) orientation. These measurements as well as angular resolved hard X-ray photoemission measurements of the Ti 2p core level furthermore allow conclusions to be drawn about the spatial extent of the interfacial 2DES.