Publication Type
Journal
Journal Name
ACS Nano
Publication Date
Page Numbers
4190 to 4196
Volume
4
Issue
7
Abstract
Atomically engineered oxide multilayers and superlattices offer unique properties controlled by the electronic and atomic structures of the interface. We report studies of ferroelectric BaTiO3 growth on an SrRuO3 electrode with in situ atomic scale analysis of the surface structure at each growth stage. An oxygen-induced surface reconstruction of SrRuO3 leads to formation of SrO rows spaced at twice the bulk periodicity. This reconstruction modifies the structure of the first BaTiO3 layers grown subsequently, including intermixing observed with cross-section spectroscopy. These observations reveal that this common oxide interface is actually more complex than previously realized.
