Karl Franzens University Graz | Graz University of Technology | |
"The Mott-Hubbard metal-insulator transition in V2O3 revisited" The isostructural metal-insulator transition in Cr-doped V2O3[1] represents one of the most known textbook examples of a Mott-Hubbard transition between a paramagnetic metal and a paramagnetic insulator driven by electronic correlations. In this talk, after introducing the key-concepts of a Mott-Hubbard transition, I illustrate it through the discussion of the physics of V2O3. This will include a review[2] of recent theoretical calculations as well as experimental findings, which have shed new light on this famous transition. In particular, we have found that the old paradigm of a doping-pressure equivalence does not hold[3], and that a microscale phase separation for Cr-doped V2O3 is actually observed [4]. |