Differential reflectance spectra and band structure ofV2O3

Polarized measurements of the reflectance and temperature-modulated reflectance spectra of ${\mathrm{V}}_2$ ${\mathrm{O}}_3$ in the range of 0.5-5.8 eV are reported. The experimental results strongly support the level scheme of Goodenough and are in good agreement with the theoretical model of Ashkenazi and Chuchem, provided the energy gaps between valence and conduction electrons are increased uniformly by about 0.8 eV. The over-all width of the $3d T_{2g}$ band is found to be ∼2.5 eV and the gap between the $2p$ valence level and the Fermi level is about 3.75 eV.