In situ anion-doped epitaxial strontium titanate films

Literature Information

Publication Date 2020-10-08
DOI 10.1039/D0CP03644G
Impact Factor 3.676
Authors

O. Pacherova, N. Nepomniashchaia, V. Vetokhina, S. Cichon, T. Kocourek, A. Dejneka


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Abstract

Misfit strains arising from a film–substrate mismatch can induce novel phases and properties in the epitaxial films of perovskite oxides. Here we employ yet another effect, namely, strain-assisted formation of oxygen vacancies. We demonstrate the misfit-promoted presence of oxygen vacancies and related substitutional incorporation of anion dopants in the epitaxial films of archetypal perovskite oxide SrTiO3. Both the oxygen vacancies and hydrogen or nitrogen dopants are introduced in situ during the pulsed-laser deposition of the films using compressive substrates. The films exhibit peculiar chemical expansion and optical properties, which are consistent with substitutional anion doping.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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