Mott-Hubbard transition in V2O3 revisited

Abstract

The isostructural metal-insulator transition in Cr-doped V 2 O 3 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 dopingpressure equivalence does not hold, and there is a microscale phase separation for Cr-doped V 2 O 3 .