Metal-insulator transitions are accompanied by huge resistivity changes, even over tens of
orders of magnitude, and are widely observed in condensed-matter systems. This article …

This review gives an overview of the presence of multiplet effects in X-ray spectroscopy, with
an emphasis on X-ray absorption studies on 3d transition metal ions in inorganic oxides and …

Transition metal oxides are capable of a wide range of work functions. This quality allows
them to be used in many applications that involve charge transfer with adsorbed molecules …

We have investigated several mixed-valence vanadium oxides, single-crystals by X-ray
photoelectron spectroscopy (XPS). Many studies have been performed on V2O5, VO2 and …

The electronic structure of La 1− x Sr x MnO 3 has been studied by photoemission and O 1s
x-ray-absorption spectroscopy. Spectra of the Mn 2p core levels and the valence bands for …

We have studied transition-metal 3d-oxygen 2p lattice models, where full degeneracy of
transition-metal 3d and oxygen 2p orbitals and on-site Coulomb and exchange interactions …

The electronic structures of a wide range of early transition-metal (TM) compounds,
including Ti and V oxides with metal valences ranging from 2+ to 5+ and formal d-electron …

We have performed photoemission and inverse photoemission experiments on a series of
3d-transition-metal oxides with formal ionic configuration from to. The photoemission core …

Optical spectra have been investigated for the prototypical Mott-Hubbard (MH) insulators
LaTiO 3 and YTiO 3, and their solid solutions La x Y 1− x TiO 3. The MH gap shows a critical …

We present x-ray photoemission spectra of the vanadium oxides, and, and their analysis in
terms of a simple cluster model based on the Anderson impurity Hamiltonian. The electronic …