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In ABO3-type perovskite metal oxides, functional responses are widely designed by substitution of metal cations A and/or B. New design dimensions arise with anions, especially hydrogen or nitrogen, substituting for oxygen. Substrate-induced strain in epitaxial films is yet another tool for tuning the properties. Epitaxial anion-substituted perovskite oxide films are weakly explored. This project aims to growth and studies of hydrogen- and nitrogen-doped perovskite oxide films, focusing on ferroelectric titanates and niobates and metal-insulator nickelates. Advanced laser- stimulated epitaxy in reactive gas ambience will be elaborated to deposit doped single-crystal films. Films structural, electronic, optic, and ferroic properties will be investigated by the state-of- the-art techniques. Fundamentals of stabilization and properties of epitaxial complex mixed- anion perovskite films will be elucidated. Unprecedented functional responses are anticipated in the films.
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