Mott-Hubbard transition in V2O3 revisited

The isostructural metal-insulator transition in Cr-doped V2O3 is the textbook example of a Mott-Hubbard transition between a paramagnetic metal and a paramagnetic insulator. We review recent theoretical calculations as well as experimental findings which shed new light on this famous transition. In particular, the old paradigm of a doping-pressure equivalence does not hold, and there is a microscale phase separation for Cr-doped V2O3.
Comment: 16 pages, 11 figures, Feature Article which reviews recent calculations and experiments which shed a new light on the famous Mott-Hubbard transition in V2O3. To appear in physica status solidi (b) 2013