Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 72: Poster Session: Correlated Electrons

TT 72.70: Poster

Mittwoch, 14. März 2018, 15:00–19:00, Poster B

Investigation of LAO/STO nanostructures — •Mithun S Prasad¹, Mohzin Minhas¹, Alexander Müller¹, and Georg Schmidt^1,2 — ¹Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 3, D-06120 Halle, Germany — ²Interdisziplinäres 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, LAlO₃ (LAO) and SrTiO₃ (STO) provides new opportunities to explore nano electronic devices. Recently our group has developed an industry compatible nano patterning technique [1] for the LAO/STO interface. Some recent studies on this interface have revealed that at low temperature the current transport in LAO/STO heterostructures is mainly through the domain boundaries which results in the formation of numerous current carrying filaments [2]. This fact also results massive changes in conductivity when a few filaments are confined in nanostructures. We investigate the dependence of the effect on the orientation of nanostructures with respect to the crystalline structure of the substrate at different temperatures and under application of a back-gate voltage.