Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 80: Low-Dimensional Systems: Oxide Hetero-Interfaces
TT 80.3: Vortrag
Freitag, 24. März 2017, 10:00–10:15, HSZ 103
Anisotropic electrical transport at the Al2O3-SrTiO3 interface — •Karsten Wolff1, Roland Schäfer1, Hilbert von Löhneysen1,2, Matthieu le Tacon1, and Dirk Fuchs1 — 1Karlsruher Institut für Technologie, Institut für Festkörperphysik, 76021 Karlsruhe — 2Karlsruher Institut für Technologie, Physikalisches Institut, 76131 Karlsruhe
At the interface of TiO2-terminated SrTiO3 and amorphous Al2O3, we observe anisotropic electrical transport behavior of the two dimensional electron system (2DES). Temperature and magnetic field dependence of the sheet resistance Rs is measured for various current directions with respect to the [100] direction of SrTiO3. Below 30 K, Rs shows a distinct anisotropic behavior which can be attributed to anisotropic defect scattering. In addition, application of magnetic field parallel to the 2DES results in a non-crystalline anisotropy which we will discuss in terms of spin-orbit coupling.