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AFM images of nano- films on -plane sapphire with Au mass thicknesses of (a) 1 nm, (b) 2 nm, (c) 4 nm, and (d) 6 nm and the (e) x-ray scan of the epitaxial thin film. The insets show (a) the surface of the bare thin film and (b) the -rocking curve at (020).
Spectral transmittance of (a) the bare (25 nm) and (b) the Au (6 nm)/ (25 nm) films on sapphire measured at a temperature range of . The number marked at the end of each curve indicates the measurement temperature.
(a) Thermal hysteresis loops of optical transmittance (at ) of films on sapphire with different Au mass thicknesses and (b) phase transition temperature of thin films as a function of .
Energy diagrams of Au and (a) before and (b) after contact.
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