Inequivalent routes across the Mott transition in V2O3 explored by X-ray absorption

Details Inequivalent routes across the Mott transition in V2O3 explored by X-ray absorption Inequivalent routes across the Mott transition in V2O3 explored by X-ray absorption

2010-01-04

arxiv.org/abs/1001.0477v1

Phys. Rev. Lett. 104, 047401 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevLett.104.047401

The changes in the electronic structure of V2O3 across the metal-insulator transition induced by temperature, doping and pressure are identified using high resolution x-ray absorption spectroscopy at the V pre K-edge. Contrary to what has been taken for granted so far, the metallic phase reached under pressure is shown to differ from the one obtained by changing doping or temperature. Using a novel computational scheme, we relate this effect to the role and occupancy of the a1g orbitals. This finding unveils the inequivalence of different routes across the Mott transition in V2O3

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