Inequivalent routes across the Mott transition in V2O3 explored by X-ray absorption.
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 a{1g} orbitals. This finding unveils the inequivalence of different routes across the Mott transition in V2O3.
Rodolakis
F
F
Laboratoire de Physique des Solides, CNRS-UMR 8502, Université Paris-Sud, F-91405 Orsay, France.
Hansmann
P
P
Rueff
J-P
JP
Toschi
A
A
Haverkort
M W
MW
Sangiovanni
G
G
Tanaka
A
A
Saha-Dasgupta
T
T
Andersen
O K
OK
Held
K
K
Sikora
M
M
Alliot
I
I
Itié
J-P
JP
Baudelet
F
F
Wzietek
P
P
Metcalf
P
P
Marsi
M
M