Oxygen-Induced Surface Reconstruction of SrRuO3 and Its Effect on the BaTiO3 Interface

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• 作者：Junsoo Shin ; Albina Y. Borisevich ; Vincent Meunier ; Jing Zhou ; E. Ward Plummer ; Sergei V. Kalinin ; Arthur P. Baddorf
• 刊名：ACS Nano
• 出版年：2010
• 出版时间：July 27, 2010
• 年：2010
• 卷：4
• 期：7
• 页码：4190-4196
• 全文大小：480K
• 年卷期：0
• ISSN：1936-086X

文摘

Atomically engineered oxide multilayers and superlattices display unique properties responsive to the electronic and atomic structures of the interfaces. We have followed the growth of ferroelectric BaTiO₃ on SrRuO₃ electrode with in situ atomic scale analysis of the surface structure at each 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 much more interesting than previously reported and provide a paradigm for oxygen engineering of oxide structure at an interface.