The angle-resolved photoemission (ARPES) technique has been developed rapidly over the
last decade, accompanied by the improvement of energy and momentum resolutions. This …

The band structure of the prototypical charge-transfer insulator NiO is computed by using a
combination of an ab initio band structure method and the dynamical mean-field theory with …

We consider a multiband Hubbard model H m for Cu and O orbitals in Ba 2− x Sr x CuO 3+ δ
similar to the three-band model for two-dimensional cuprates. The hopping parameters are …

Tetragonal CuO (T-CuO) has attracted attention because of its structure similar to that of the
cuprates. It has been recently proposed as a compound whose study can give an end to the …

We consider a multiband Hubbard model $ H_m $ for Cu and O orbitals in Ba $ _ {2-x} $ Sr
$ _x $ CuO $ _ {3+\delta} $ similar to the tree-band model for two-dimensional (2D) …

We have investigated the lowest binding-energy electronic structure of the model cuprate Sr
2 CuO 2 Cl 2 using angle-resolved photoemission spectroscopy. Our data from about 80 …

I extend to charge and bond operators the transformation that maps the ionic Hubbard
model at half filling onto an effective spin Hamiltonian. Using the transformed operators I …

In order to shed light on the electronic structure of Na x CoO 2, and motivated by recent Co L-
edge x-ray absorption spectra (XAS) experiments with polarized light, we calculate the …

Using numerical diagonalization of a 4× 4 cluster, we calculate on-site s, extended-s, and dx
2− y 2 pairing correlation functions (PCF's) in an effective generalized Hubbard model for …

We present a variational approach based on the string picture to analyze the internal
structure and dispersion of spin polarons with different symmetries in an antiferromagnet …