Evolution of epitaxial BaTiO3 on SrTiO3-buffered Si: Phase field analysis
Abstract
Barium titanate (BaTiO3) is a promising candidate for electro-optical modulators in Si photonics. The BaTiO3 ferroelectric domain morphology is strongly affected by thermal, electrical, and mechanical conditions and, in turn, profoundly influences the film's optical properties. Because BaTiO3 film growth takes place at a relatively high temperature, upon cooling, the film is subject to complex thermal effects that involve changes in the crystal phase, the emergence of ferroelectricity, and variations in the strain level. We use a phase field model to describe the evolution of the BaTiO3 thin film domain morphology upon cooling from growth to room temperature. We demonstrate that cooling under different cooling scenarios results in different domain morphologies. Our simulations provide a clear temperature–strain map and thermal strategy for controllable BaTiO3 epitaxy on the SrTiO3-buffered Si substrate.
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The authors' films show the opposite trend to Li et al.: more c-oriented with fast cooling.
“As discussed below, we observe the opposite trend in our films (more c-oriented with fast cooling)”
From Enhancement of Electro-Optic Response in BaTiO3 Films Integrated on Si via Heating and Cooling Rate Control (2025) · cites this paper as [39]
The authors' films may follow what Li et al. called Scenario III.
“It appears that our films may follow what Li et al. have called Scenario III.”
From Enhancement of Electro-Optic Response in BaTiO3 Films Integrated on Si via Heating and Cooling Rate Control (2025) · cites this paper as [39]
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- Authors
- Li, W., Landis, C. M., & Demkov, A. A.
- Affiliations
- The University of Texas at Austin (US)
- Corresponding author
- Demkov, Alexander A.
- Venue
- Journal of Applied Physics
- Publisher
- AIP Publishing
- Published
- 2022-12-02
- Volume
- 132
- Issue
- 21
- ISSN
- 0021-8979 (ISSN-L)
- 1089-7550
- OpenAlex
- W4311117537
- Cited by
- 8
- References
- 60
- Citations by year
- 2026: 1 · 2025: 4 · 2024: 2 · 2023: 1
- FWCI
- 0.49
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Applied Physics (publishedVersion)
- Funders
- Air Force Office of Scientific Research (FA9550-18-1-0053)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Ferroelectric and Piezoelectric Materials
- Physical Sciences › Materials Science › Materials Chemistry › Electronic and Structural Properties of Oxides
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Photorefractive and Nonlinear Optics
- Keywords
- barium titanate, epitaxial thin films, phase-field simulation, thermal strain, Si photonics, electro-optic modulator, epitaxial growth
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