PHOTOEMISSION-STUDY OF THE SPECTRAL-FUNCTION OF V2O3 IN RELATION TO THE RECENT QUANTUM MONTE-CARLO STUDY

Photoelectron energy distribution curves near the Fermi level have bee n measured on V2O3 above and below the critical temperature of the met al-insulator transition. In insulating phase, the band gap was found t o be about 0.2 eV, which is consistent with the other experimental res ults. 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 photo emission shows the hybridization effect is also important for the spec tral feature.