Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 59: Complex Oxides Interfaces and Charge Order

TT 59.1: Vortrag

Donnerstag, 4. April 2019, 15:00–15:15, H22

Anisotropic transport properties in LAO/STO nanostructures — •Mithun S Prasad¹ and Georg Schmidt^1,2 — ¹Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 3, D-06120 Halle, Germany — ². Interdisziplinäres Zentrum für Meterialwissenschaften, Martin-Luther-Universität Halle-Wittenberg, Heinrich-Damerow-Straße 4, D-06120 Halle, Germany

The high-mobility two-dimensional electron gas (2DEG) confined at the interface of two insulating complex oxides, LaAlO3 (LAO) and SrTiO3 (STO) provides new opportunities to explore nano electronic devices. In our group we have developed an industry compatible nano patterning technique [1] for the LAO/STO interface. Recent studies on this interface have revealed that at low temperature the current is confined to filaments which are linked to structural domain walls in the STO [2] with drastic consequences for example for the temperature dependence of local transport properties [3]. We have investigated magneto transport in nanostructures of different orientation with respect to the lattice. Our experiments show that not only the resistance but also the magnetoresistance varies with orientation. The magnetoresistance can even change sign strongly supporting the model of filamentary charge transport.
M. Z. Minhas et al. , AIP Advances 6, 035002 (2016)