Oxide multilayer heteroepitaxy combining Mott-insulator vanadium dioxide (VO2) films and functional conducting/ferroelectric/dielectric films opens new opportunities in creating functional devices with applicability in the field of nonvolatile memories for neuromorphic devices. The growth of high quality VO2 films is challenging due to the necessity of precise control of the vanadium cation valence state. In this study, the authors report on electrical and structural properties of VO2 thin films deposited on various single crystal oxide substrates commonly used in oxide electronics and on PbZrxTi(1−x)O3/SrRuO3 ferroelectric heterostructures deposited on SrTiO3 and GaScO3 single crystal substrates. The optimized VO2 films exhibit a metal-to-insulator phase transition on all applied substrate/film combinations.

Topics
Crystal lattices, Phase transitions, Heterostructures, Nonvolatile memory, Epitaxy, Ferroelectric materials, Insulators, Thin films, X-ray diffraction, Oxides
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