The fact that magnetite (Fe304) was already known in the Greek era as a peculiar mineral is
indicative of the long history of transition metal oxides as useful materials. The discovery of …

We introduce a microscopic model which unravels the physical mechanisms responsible for
the observed phase diagram of the R VO 3 perovskites. It reveals a nontrivial interplay …

We study the zero temperature phase diagram of the three-dimensional Kugel-Khomskii
model on a cubic lattice using the cluster mean field theory and different perturbative …

The effect of the average R-site ionic radius⟨ IR⟩ and variance on the orbital and magnetic
order in R 3+-doped YVO 3 was studied in Y 1-x La x VO 3 and Y 1-x (La 0.2337 Lu 0.7663) …

We derive the Kugel-Khomskii spin-orbital model for a bilayer and investigate its phase
diagram depending on Hund's exchange JH and the eg orbital splitting E z. In the (classical) …

The effects of isovalent do** on orbital ordering in the perovskite Y 1− x La x VO 3 were
investigated using neutron diffraction and the pair distribution function analysis. YVO 3 is a …

A short introduction to the complex phenomena encountered in transition metal oxides with
either charge or orbital or joint charge-and-orbital order, usually accompanied by magnetic …

This thesis explores new aspects of the vanadates, and raise many themes of discussion.
Despite the fact that systems containing partially filled t2g have in general received less …

The properties of Mott insulators with orbital degrees of freedom are described by spin-
orbital superexchange models, which provide a theoretical framework for understanding …

We study a spin-orbital model in which the spin-spin interaction couples linearly to the
orbital isospin. Fluctuations drive the transition from a paramagnetic state to a C-type …