Epitaxial growth of perovskite oxide films facilitated by oxygen vacancies

0552097 - FZÚ 2022 RIV GB eng J - Journal Article
Tyunina, Marina - Rusevich, L.L. - Kotomin, E.A. - Pacherová, Oliva - Kocourek, Tomáš - Dejneka, Alexandr
Epitaxial growth of perovskite oxide films facilitated by oxygen vacancies.
Journal of Materials Chemistry C. Roč. 9, č. 5 (2021), s. 1693-1700. ISSN 2050-7526. E-ISSN 2050-7534
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GA19-09671S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : perovskite oxide films * oxygen vacancies
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 8.067, year: 2021
Method of publishing: Open access

Single-crystal epitaxial films of technologically important and scientifically intriguing multifunctional ABO3 perovskite-type metal oxides are essential for advanced applications and understanding of these materials. In such films, a film-substrate misfit strain enables unprecedented crystal phases and unique properties that are not available in their bulk counterparts. However, the prerequisite growth of strained epitaxial films is fundamentally restricted by misfit relaxation. Here we demonstrate that introduction of a small oxygen deficiency concurrently stabilizes epitaxy and increases lattice strain in thin films of archetypal perovskite oxide SrTiO3. By combining experimental and theoretical methods, we found that lattice distortions around oxygen vacancies lead to anisotropic local stresses, which interact with the misfit strain in epitaxial films.
Permanent Link: http://hdl.handle.net/11104/0327245