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Selective growth of epitaxial Sr2IrO4 by controlling plume dimensions in pulsed laser deposition
- Source :
- Appl. Phys. Lett. 109, 201901 (2016)
- Publication Year :
- 2016
-
Abstract
- We report that epitaxial Sr2IrO4 thin-films can be selectively grown using pulsed laser deposition (PLD). Due to the competition between the Ruddlesden-Popper phases of strontium iridates (Sr_{n+1}Ir_{n}O_{3n+1}), conventional PLD methods often result in mixed phases of Sr2IrO4 (n = 1), Sr3Ir2O7 (n = 2), and SrIrO3 (n = infinity). We have discovered that reduced PLD plume dimensions and slow deposition rates are the key for stabilizing pure Sr2IrO4 phase thin-films, identified by real-time in-situ monitoring of their optical spectra. The slow film deposition results in a thermodynamically stable TiO2\\SrO\IrO2\SrO\SrO configuration at an interface rather than TiO2\\SrO\SrO\IrO2\SrO between a TiO2-teminated SrTiO3 substrate and a Sr2IrO4 thin film, which is consistent with other layered oxides grown by molecular beam epitaxy. Our approach provides an effective method for using PLD to achieve pure phase thin-films of layered materials that are susceptible to several energetically competing phases.<br />Comment: 6 pages, 4 figures
Details
- Database :
- arXiv
- Journal :
- Appl. Phys. Lett. 109, 201901 (2016)
- Publication Type :
- Report
- Accession number :
- edsarx.1610.06795
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1063/1.4967450