Stabilization of the perovskite phase in the Y-Bi-O system by using a BaBiO$_{3}$ buffer layer
| Autor: | Bouwmeester, Rosa Luca, de Hond, Kit, Gauquelin, Nicolas, Verbeeck, Jo, Koster, Gertjan, Brinkman, Alexander |
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| Rok vydání: | 2019 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1002/pssr.201800679 |
| Popis: | 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. Comment: 8 pages, 7 figures + 4 pages supporting information |
| Databáze: | arXiv |
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