Stabilization of the perovskite phase in the Y-Bi-O system by using a BaBiO3 buffer Layer

Rosa Luca Bouwmeester (Corresponding Author), C.A.J. de Hond, Nicolas Gauquelin, Jo Verbeeck, G. Koster, Alexander Brinkman

Research output: Contribution to journalLetterAcademicpeer-review

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Abstract

A topological insulating phase has theoretically been predicted for the thermodynamically unstable perovskite phase of YBiO3. Here, it is shown that the crystal structure of the Y–Bi–O system can be controlled by using a BaBiO3 buffer layer. The BaBiO3 film overcomes the large lattice mismatch of 12% with the SrTiO3 substrate by forming a rocksalt structure in between the two perovskite structures. Depositing an YBiO3 film directly on a SrTiO3 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.
Original languageEnglish
Article number1800679
Number of pages8
JournalPhysica status solidi. Rapid research letters
Volume13
Issue number7
Early online date6 Mar 2019
DOIs
Publication statusPublished - 1 Jul 2019

Keywords

  • UT-Hybrid-D
  • Perovskite oxide
  • Pulsed Laser Deposition (PLD)
  • Transmission Electron Microscopy (TEM)
  • topological insulators
  • Buffer layers
  • buffer layers
  • pulsed laser deposition
  • perovskite oxides
  • scanning transmission electron microscopy

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