Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 80: Low-Dimensional Systems: Oxide Hetero-Interfaces
TT 80.5: Vortrag
Freitag, 24. März 2017, 10:30–10:45, HSZ 103
Tunable redox-created 2DES at the EuO/SrTiO3 interface — •Patrick Lömker1, Tobias Rödel2, Timm Gerber1, Patrick LeFevre3, Francois Bertran3, Emmanouil Frantzeskakis2, Andrés Santander-Syro2, and Martina Müller1,4 — 1Forschungszentrum Jülich GmbH, PGI-6, Jülich, Germany — 2CSNSM, CNRS/IN2P3 and Université Paris-Sud, Orsay, France — 3Synchrotron SOLEIL, Saint-Aubin, France — 4Universität Duisburg-Essen, Duisburg, Germany
Two-dimensional electron systems (2DES) of transition metal oxides are of interest in the research for novel properties of oxidic systems. Well known systems, such as LaAlO3/SrTiO3, are challenging to fabricate in a consistent way for varying deposition techniques. A recent study enabled the fabrication of 2DES in a experimentally simple way by utilizing a non-magnetic reducing agent. [1]
In our study, we use Eu metal as the reducing agent in order to redox-create EuO. EuO belongs to the rare material class of magnetic insulators. This property combination makes EuO interesting for fundamental spintronics studies, e.g. decoupling spin from charge currents or electrical sensing of magnetic properties.
The EuO/SrTiO3 interface is studied using in-situ ARPES. Ex-situ magnetometry is utilized to analyze the ferromagnetic properties of 1-2ML EuO films and element-selective XPS depth-profiling probes the thickness of the 2DES region. We find a 2DES in which electrical and ferromagnetic properties can be controlled simultaneously.
[1] Rödel, Advanced Materials 28, 1976-1980 (2016).