TY - JOUR
KW - binding energy
KW - Fermi level
KW - paper
KW - paramagnetic materials
KW - photoelectron spectra
KW - valence bands
KW - vanadium compounds
AU - E. Papalazarou
AU - Matteo Gatti
AU - Marino Marsi
AU - V. Brouet
AU - Federico Iori
AU - Lucia Reining
AU - E. Annese
AU - I. Vobornik
AU - F. Offi
AU - A. Fondacaro
AU - Simo Huotari
AU - P. Lacovig
AU - O. Tjernberg
AU - N. Brookes
AU - M. Sacchi
AU - P. Metcalf
AU - Giancarlo Panaccione
AB - We present a comprehensive study of the photon energy dependence of the valence band photoemission yield in the prototype Mott-Hubbard oxide V2O3. The analysis of our experimental results, covering an extended photon energy range (20?6000 eV) and combined with GW calculations, allows us to identify the nature of the orbitals contributing to the total spectral weight at different binding energies, and in particular to locate the V 4s states at about 8 eV binding energy. From this comparative analysis, we conclude that the intensity of the quasiparticle photoemission peak, observed close to the Fermi level in the paramagnetic metallic phase upon increasing photon energy, does not have a significant correlation with the intensity variation in the O 2p and V 3d yield, thus, confirming that bulk sensitivity is an essential requirement for the detection of this coherent low-energy excitation.
BT - Physical Review B (Condensed Matter and Materials Physics)
DO - 10.1103/PhysRevB.80.155115
M1 - 15
N2 - We present a comprehensive study of the photon energy dependence of the valence band photoemission yield in the prototype Mott-Hubbard oxide V2O3. The analysis of our experimental results, covering an extended photon energy range (20?6000 eV) and combined with GW calculations, allows us to identify the nature of the orbitals contributing to the total spectral weight at different binding energies, and in particular to locate the V 4s states at about 8 eV binding energy. From this comparative analysis, we conclude that the intensity of the quasiparticle photoemission peak, observed close to the Fermi level in the paramagnetic metallic phase upon increasing photon energy, does not have a significant correlation with the intensity variation in the O 2p and V 3d yield, thus, confirming that bulk sensitivity is an essential requirement for the detection of this coherent low-energy excitation.
PB - APS
PY - 2009
EP - 155115
T2 - Physical Review B (Condensed Matter and Materials Physics)
TI - Valence-band electronic structure of V[sub 2]O[sub 3]: Identification of V and O bands
UR - http://link.aps.org/abstract/PRB/v80/e155115
VL - 80
ER -