Dresden 2011 – scientific programme
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O: Fachverband Oberflächenphysik
O 60: Poster Session IV (Solid/liquid interfaces; Semiconductors; Oxides and insulators; Graphene; Plasmonics and nanooptics; Electronic Structure; Surface chemical reactions; Heterogeneous catalysis)
O 60.99: Poster
Wednesday, March 16, 2011, 17:30–21:00, P4
(contribution withdrawn) Energy-filtered PEEM at ferroelectric nanostructures: Fingerprints of the ferroelectric polarization in the electronic structure of PbZr0.52Ti0.48O3 — •Ingo P. Krug1, Nick Barrett2, Astrid Besmehn4, Alessio Morelli3, Ayan Roy Chaudhuri3, Ionela Vrejoiu3, Marten Patt1, Olivier Renault5, Fausto Sirotti6, and Claus M. Schneider1 — 1IFF-9, Forschungszentrum Jülich GmbH, Jülich, GERMANY — 2DSM/IRAMIS/SPCSI, C.E.A. Saclay, Gif-sur-Yvette, FRANCE — 3MPI für Mikrostrukturphysik, Halle, GERMANY — 4ZCH, Forschungszentrum Jülich GmbH, Jülich, GERMANY — 5LETI group, MINATEC, C.E.A. Grenoble, Grenoble, FRANCE — 6TEMPO beamline, Synchrotron SOLEIL, Gif-sur-Yvette, FRANCE
Ferroelectrics are promising materials for nanoelectronic devices. Their versatility offers a widespread range of applications, for example, non-volatile memory-cells, controllable surface catalysts, or energy harvesting devices. The key to improved functionality is to understand the interrelations between electronic structure and ferroelectricity. Many ferroelectrics are thought to exhibit a combined structural and electronic reconstruction upon ferroelectric ordering. While the structural aspects can easily be investigated by diffraction, determining the electronic structure by photoemission is often challenging due to the insulating nature of this material class. Nevertheless, as we show for the case of PbZr0.52Ti0.48O3 (PZT), spectromicroscopic studies in these materials are rewarding: Energy-filtered PEEM by a NanoESCA microscope reveals polarization effects in core-levels and the valence-band.