Optical properties of VO${}_2$ films at the phase transition: influence of substrate and electronic correlations

Abstract

Thin films of VO${}_2$ on different substrates, Al${}_2$O${}_3$ and SiO${}_2$/Si, have been prepared and characterized from room temperature up to 360 K. From the band structure in the rutile metallic phase and in the monoclinic insulating phase the optical properties are calculated and compared with reflection measurements as a function of temperatures. Various interband transitions can be assigned and compared with previous speculations. We extract the parameters of the metallic charge carriers that evolve upon crossing the insulator-to-metal phase transition and find effects by the substrate. The effect of electronic correlations becomes obvious at the phase transition.

arXiv comment6 pages, 6 figures

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Cited by in corpus (6)

• VO2 microcrystals as advanced smart window material at semiconductor to metal transition
• Microscopic nature of the asymmetric hysteresis in the insulator-metal transition of VO${}_2$ revealed by spectroscopic ellipsometry
• High Infrared Reflectance Modulation in VO2 Films Synthesized on Glass and ITO coated Glass substrates using Atmospheric Oxidation of Vanadium
• Self-Regulated Transport in Photonic Crystals with Phase-Changing Defects
• Role of non-linear effects and standing waves in microwave spectroscopy: Corbino measurements on superconductors and VO${}_2$
• Optical forces on an oscillating dipole near VO${}_2$ phase transition