The formation of interfacial layers between silicon and the overgrown epitaxial SrTiO3 as a function of the growth temperature has been studied in detail using x-ray photoelectron spectroscopy and high-resolution transmission electron microscopy. Models for the chemical compositions and atomic bonding states have been established. With a good understanding of the mechanisms of the interfacial layer formations, the molecular-beam epitaxy growth process can be well controlled to form high-quality, single-crystalline oxide films, as well as a desired interface between the grown oxide and silicon substrate. The epitaxial relationship has been found to be SrTiO3 (001)parallel toSi(001), and SrTiO3 [100]parallel toSi[110]. (C) 2003 American Institute of Physics.
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