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O: Fachverband Oberflächenphysik

O 19: Clean surfaces I

O 19.3: Vortrag

Montag, 26. März 2012, 18:00–18:15, A 053

Bulk and Surface Characterization of In2O3(001) Single Crystals — •Daniel Hagleitner¹, Manfred Menhart¹, Peter Jacobson¹, Sara Blomberg², Karina Schulte², Edvin Lundgren², Frank Kubel³, Christoph Puls³, Andreas Limbeck³, Herbert Hutter³, Lynn Boatner⁴, Michael Schmid¹, and Ulrike Diebold¹ — ¹Institute of Applied Physics, TU Wien, Austria — ²Division of Synchrotron Radiation Research, Lund University, Sweden — ³Institute of Chemical Technologies and Analytics, TU Wien, Austria — ⁴Materials Science and Technology Division, Oak Ridge National Laboratory, USA

Indium oxide, In2O3, has drawn increased attention from researchers over recent years. When doped with SnO2, the material is commonly referred to as Indium Tin Oxide (ITO), which is the prototypical Transparent Conducting Oxide (TCO). ITO combines high optical transparency in the visible range with a conductivity approaching that of a metal. Despite the technological importance of ITO, surprisingly little is known about its surface properties or those of pure indium oxide. We will present STM, STS, PES, LEIS and XRD results of high-quality single crystals grown by the flux method. In particular, we will discuss atomically-resolved STM images of the In2O3(001) single crystal surface depending on the surface preparation (reduced/oxidized/hydrogenated) conditions. PES and STS data show a significant difference of the electronic structure (surface states, band bending) depending on the surface preparation.