Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 53: Poster Wednesday: Spins and Magnetism
O 53.1: Poster
Mittwoch, 7. September 2022, 18:00–20:00, P4
Ferroelectric BaTiO3 (001): Atomic-level characterization and polarization by combined STM/AFM — •Llorenç Albons Caldentey1, Dominik Wrana1, Igor Sokolović2, Aji Alexander1, and Martin Setvin1 — 1Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, 180 00 Prague 8, Czech Republic — 2Institute of Applied Physics, TU Wien, 1040 Vienna, Austria
Perovskites attract strong interest thanks to their catalytic properties, efficient electron-hole separation in light harvesting, or the frequent occurrence of ferroelectricity. In this work we show that BaTiO3 single crystals can be cleaved along the (001) plane to obtain flat surfaces with domains of either BaO or TiO2 termination. Using low temperature (4K) qPlus nc-AFM we have characterized the surface atomic structure and studied the tip-induced ferroelectric polarization of the material. The impact of ferroelectric poling on adsorbed species is discussed.