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The VO2 film and the experimental configurations for transport and KPFM measurements.
(a) W sample maps obtained at three temperatures during the heating (upper row) and cooling (lower row) of a VO2 thin film (area 1 μm2), (b) W sample and resistance curves with respect to temperature, and (c) histograms of W sample maps at three temperatures during heating.
Energy band diagrams of (a) metallic VO2 () and semiconducting VO2 (), (b) interface with domains larger than the SCR width, and (c) region for domains smaller than the SCR width. Case (a) describes the band for a single, homogeneous phase. Cases (b) and (c) describe band banding in the vicinity of the domain boundaries of an electronically inhomogeneous sample near T MIT.
(a) Maps of surface potential under an applied biasvoltage of 1 V between the electrodes on the VO2 (V surf,1V), (b) profiles of ΔV surface = V surface,1V – V surface,0V, at 313 and 355 K, and (c) profiles of ΔV surface and W sample at 343 K.
(a) Topography and four selected regions (denoted as colored circles) of a VO2 thin film surface and (b) temperature dependence of local W sample taken at the four regions.
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