We study the correlation-induced deformation of Fermi surfaces by means of a new
diagrammatic method which allows for the analytical evaluation of Gutzwiller wave functions …

Using an advanced version of the renormalized mean-field theory for the tJ model, we
examine the spin-singlet superconducting (SC) state of dx 2-y 2 symmetry. Overall doping …

A systematic diagrammatic expansion for Gutzwiller wavefunctions (DE-GWFs) proposed
very recently is used for the description of the superconducting (SC) ground state in the two …

A microscopic theory of superconductivity in the extended Hubbard model which takes into
account the intersite Coulomb repulsion and electron-phonon interaction is developed in the …

We apply the extended (statistically consistent, SCA) Gutzwiller-type approach to the
periodic Anderson model (PAM) in an applied magnetic field and in the strong-correlation …

An orbitally degenerate two-band Hubbard model is analyzed with the inclusion of the
Hund's rule-induced spin-triplet even-parity paired states and their coexistence with …

We start from the Anderson–Kondo lattice model derived by us earlier, in which both the
Kondo interaction and the residual hybridization processes have been included in a …

The observation of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconducting state and
detection of the spin-dependent effective masses (SDM) of quasiparticles in heavy-fermion …

The coexistence of antiferromagnetism with superconductivity is studied theoretically within
the tJ model with the Zeeman term included. The strong electron correlations are accounted …

We discuss the Hubbard model in an applied magnetic field and analyze the properties of
neutral spin-$\frac {1}{2} $ fermions within the so-called statistically consistent Gutzwiller …