Dresden 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 89: Poster Session - Oxide and Insulator Surfaces: Structure, Epitaxy and Growth
O 89.3: Poster
Mittwoch, 18. März 2020, 18:15–20:00, P2/1OG
Surface Charge patterning and mapping on SrTiO3 thin films — •Mirco Wendt1, Eric Andersen1, Regina Lange1, Sven Kraft1, Ronny Brandenburg1,2, Ingo Barke1, and Sylvia Speller1 — 1Institute of Physics, University of Rostock, 18059 Rostock, Germany — 2Leibniz Institute for Plasma Science and Technology, 17489 Greifswald, Germany
Perovskites such as SrTiO3 are oxides with high permittivity which show ferroelectric behaviour under certain conditions [1]. We address the question whether surface charges can be stabilised by strong substrate polarisation which would be an interesting property for controlled adsorption, e.g. via command layers, and for biological applications. We use SrTiO3 thin films grown by pulsed laser deposition on SrTiO3(100) and expose them to electron beams through a mask at different kinetic energies in a scanning electron microscope (SEM). Detection is accomplished by force microscopy methods (AFM) with the aim to map the resulting charge distributions. Alternative techniques for charge deposition, detection and imaging are discussed.
[1] HW Jang, et al, Phys Rev Lett 104, 197601(2010)