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

Rodolakis, F. ; Hansmann, P. ; Rueff, J.-P. ; Toschi, A. ; Haverkort, M. W. ; Sangiovanni, G. ; Tanaka, A. ; Saha-Dasgupta, T. ; Andersen, O. K. ; Held, K. ; Sikora, M. ; Alliot, I. ; Itié, J. P. ; Baudelet, F. ; Wzietek, P. ; Metcalf, P. ; Marsi, M. (2010) Inequivalent routes across the Mott transition in V2O3 explored by X-ray absorption Physical Review Letters, 104 (4). 047401_1-047401_4. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v104/i4/e047401

Related URL: http://dx.doi.org/10.1103/PhysRevLett.104.047401

Abstract

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.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:65073
Deposited On:15 Oct 2011 12:02
Last Modified:15 Oct 2011 12:02

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