Berlin 2012 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 37: Poster II: Focused electron beam induced processing for the fabrication of nanostructures (focused session, jointly with O); Nanoengineered thin films; Layer properties: electrical, optical, and mechanical properties; Thin film characterization: structure analysis and composition (XRD, TEM, XPS, SIMS, RBS,..); Application of thin films

DS 37.30: Poster

Donnerstag, 29. März 2012, 15:00–17:00, Poster E

Spectroscopic Investigation of LaAlO₃ - SrTiO₃ Heterointerfaces — •Uwe Treske¹, Andreas Koitzsch¹, Martin Knupfer¹, Kathrin Dörr², and Bernd Büchner¹ — ¹IFW-Dresden — ²MLU Halle-Wittenberg

In recent years epitaxial growth of transition metal oxides became possible and exotic phenomena were found at their interfaces. A prominent example is the formation of a high-mobility two-dimensional electron gas at the interface of LaAlO₃ grown on TiO₂-terminated SrTiO₃ substrates. Such heterointerfaces fabricated by pulsed laser deposition under various growth conditions were investigated with soft x-ray photoemission spectroscopy. We focused on stoichiometric aspects as well as in-gap states and differences in the core levels. Deviations from an abrupt interface without defects were found.