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arXiv · 1903.02321

Stabilization of the perovskite phase in the Y-Bi-O system by using a BaBiO$_{3}$ buffer layer

Rosa Luca Bouwmeester·Kit de Hond·Nicolas Gauquelin·Jo Verbeeck·Gertjan Koster·Alexander Brinkman
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Abstract

A topological insulating phase has theoretically been predicted for the thermodynamically unstable perovskite phase of YBiO$_{3}$. Here, it is shown that the crystal structure of the Y-Bi-O system can be controlled by using a BaBiO$_{3}$ buffer layer. The BaBiO$_{3}$ film overcomes the large lattice mismatch of 12% with the SrTiO$_{3}$ substrate by forming a rocksalt structure in between the two perovskite structures. Depositing an YBiO$_{3}$ film directly on a SrTiO$_{3}$ substrate gives a fluorite structure. However, when the Y-Bi-O system is deposited on top of the buffer layer with the correct crystal phase and comparable lattice constant, a single oriented perovskite structure with the expected lattice constants is observed.

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Rosa Luca Bouwmeester, Kit de Hond, Nicolas Gauquelin, Jo Verbeeck, Gertjan Koster, Alexander Brinkman. 2019-03-06. Stabilization of the perovskite phase in the Y-Bi-O system by using a BaBiO$_{3}$ buffer layer. https://doi.org/10.1002/pssr.201800679

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