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Using the ab-initio LDA+DMFT technique, we study the first-order Mott
transitions
(PI-PM) in two early transition-metal (Vanadium) oxides. In a very new
picture of
this transition, we show how an effective two-fluid scenario can be
selfconsistently
derived. Various puzzling aspects of the physical properties are
understood
quantitatively. In particular,
(i) excellent agreement with photo-emission and X-ray absorption spectra is demonstrated in the PM phase of both vanadates, (ii) the spin state and the switch of orbital occupation across the MIT in V2O3 is correctly reproduced, and, (iii) the carrier effective mass is derived to be in close agreement with that estimated from thermodynamic measurements |