Photoemission Study of the Spectral Function of V2O3in Relation to the Recent Quantum Monte Carlo Study

Abstract

Photoelectron energy distribution curves near the Fermi level have been measured on V 2 O 3 above and below the critical temperature of the metal-insulator transition. In insulating phase, the band gap was found to be about 0.2 eV, which is consistent with the other experimental results. A clear Fermi edge, which becomes sharp at lower temperature, is found in the metallic phase. The 3d spectral feature is discussed in relation to the recent quantum-Monte-Carlo calculation. Resonant photoemission shows the hybridization effect is also important for the spectral feature.