Regensburg 2022 – scientific programme

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DS: Fachverband Dünne Schichten

DS 20: Poster

DS 20.36: Poster

Wednesday, September 7, 2022, 16:00–18:00, P3

2D electronic states at Fe_xO_y/STO interfaces — •Pia M. Düring¹, Paul Rosenberger^1,2, Lutz Baumgarten³, Fatima Alarab⁴, Frank Lechermann⁵, Vladimir N. Strocov⁴, and Martina Müller¹ — ¹Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany — ²Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund, Germany — ³FZ Jülich GmbH, PGI-6, 52425 Jülich, Germany — ⁴PSI, Swiss Light Source, CH-5232 Villingen PSI, Switzerland — ⁵Institut für Theoretische Physik III, Ruhr-Universität Bochum, 44780 Bochum, Germany

Oxide interfaces play an important role in investigating phenomena like 2D electronic states which can feature properties like magnetism, superconductivity or the spin Hall effect. While 2DEGs have been reported for various oxide systems like LAO/STO or EuO/STO, the direct experimental evidence for the counterpart, the 2DHG, is still lacking. Using our UHV-MBE system, we grow high-quality oxide heterostructures to investigate these properties using synchrotron radiation. Here presented are the results of resonant photoelectron spectroscopy measurements that reveal the emergence of different 2DESs at Fe_xO_y/STO interfaces which suggests a dependence of the 2D interface properties on the oxidation state of Fe.