Dresden 2006 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

O: Oberflächenphysik

O 29: Poster session II (Nanostructures, Magnetism, Particles and clusters, Scanning probe techniques, Time-resolved spectroscopy, Structure and dynamics, Semiconductor surfaces and interfaces, Oxides and insulators, Solid-liquid interfaces)

O 29.72: Poster

Mittwoch, 29. März 2006, 14:30–17:30, P2

Morphology and electronic structure of ultrathin manganese oxide films — •Mathias Nagel, Lei Zhang, Heiko Peisert, and Thomas Chassé — Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany.

Binary transition metal monoxides have been of basic scientific interest for many years. Due to their high electronic correlation they reveal interesting properties. Of particular interest besides their electronic properties are magnetic phenomena in layer systems which are already utilised in technical applications. As a consequence of the trend in miniaturising devices questions about the influence of the reduced dimensionality on the properties arise. In layered systems the influence of the morphology and the reactions directly at the specific interface have to be evaluated.

The MnO/Ag(100) is an interesting model system due to the lattice mismatch which is quite high (9 %). By choosing the optimal preparation method either pseudomorphic growth or relaxed growth of MnO on Ag(100) can be obtained. This defined growth method is giving the possibility of studying seperately the interface strain and the effect of the reduced dimensionality. Ultrathin, epitaxial layers of MnO were prepared at Ag(100) and characterised in-situ by means of XPS, XPD and LEED. Additionally, in-situ grown samples were investigated with XES und XAS measurements. By combining these techniques a detailed understanding of the morphology and electronic structure of the evolving film can be obtained and is discussed.