期刊
JOURNAL OF APPLIED PHYSICS
卷 113, 期 18, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4803705
关键词
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资金
- Office of Naval Research (ONR) [N000 14-10-1-0489]
- National Science Foundation [DMR-1207342]
- Texas Advanced Computing Center
Using density functional theory, we analyze the wetting conditions for Pt on the (001) surface of ferroelectric BaTiO3 (BTO). We estimate the surface energy of (100), (110), and (111) Pt to be 2.42, 2.49, and 2.00 J/m(2), respectively. We find the BTO surface energy to vary between 0.26 and 2.28 J/m(2) depending on termination, polarization, and chemical environment. The interface energy between TiO2-terminated out-of-plane polarized BTO and (100) Pt is found to be between 1.64 and 2.62 J/m(2), indicating that (100) Pt cannot wet BTO for this interface. A similar result is found for an interface with (110) Pt. Cross-sectional transmission electron microscopy of Pt films grown on BTO by molecular beam epitaxy with a low flux at high deposition temperature shows Volmer-Weber islands, consistent with first principles calculations. (C) 2013 AIP Publishing LLC.
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