We review recent results for the properties of doped antiferromagnets, obtained by the
numerical analysis of the planar tJ model using the novel finite-temperature Lanczos method …

We use cluster dynamical mean-field theory to study the simplest models of correlated
electrons, the Hubbard model and the tJ model. We use a plaquette embedded in a medium …

A fermion-spin transformation is used to implement the charge-spin separation, and is
developed to study the low-dimensional tJ model. In this approach, the charge and spin …

Recent atomic resolution scanning tunneling microscope (STM) measurements discovered
remarkable electronic inhomogeneity, ie, nanoscale spatial variations of the local density of …

We argue that the binding between doubly occupied (doublon) and empty (holon) sites
governs incoherent excitations and plays a key role in the Mott transition in strongly …

The density response function N (q, ω) of the two-dimensional t− J model is studied starting
from a mixed-gauge formulation of the slave-boson approach. Our results for N (q, ω) are in …

We analyze the single-particle and collective excitations near the metal to charge-transfer
insulator transition, using the slave-boson technique. We show that the Mott transition can …

The dynamical properties of an extended Hubbard model, which is relevant to quarter-filled
layered organic molecular crystals, are analyzed. We have computed the dynamical charge …

Spectral functions within the generalized t− J model as relevant to cuprates are analyzed
using the method of equations of motion for projected fermion operators. In the evaluation of …

Employing a large-N scheme of the layered tJ model with the long-range Coulomb
interaction, which captures the fine details of the charge excitation spectra recently observed …