The microscopical analysis of the unconventional and puzzling physics of the underdoped
cuprates, as carried out lately by means of the composite operator method (COM) applied to …

The Hubbard model plays a special role in condensed matter theory as it is considered to be
the simplest Hamiltonian model one can write in order to describe anomalous physical …

A microscopic theory for the electron spectrum of the CuO 2 plane within an effective pd
Hubbard model is proposed. The Dyson equation for the single-electron Green's function in …

A microscopic theory of superconductivity is considered in the framework of the Hubbard pd
model for the CuO 2 plane. The Dyson equation is derived in the nonintersecting diagram …

Starting with a minimal model for the CuO 2 planes with the on-site Hilbert space reduced to
only three effective valence centers [CuO 4] 7−, 6−, 5−(nominally Cu 1+, 2+, 3+) with …

Starting from the generalized t− J− G model Hamiltonian, we analyze the spin response in
the superconducting cuprates taking into account both local and itinerant spin components …

A variational treatment of the Gutzwiller—renormalized tJ Hamiltonian combined with the
mean-field (MF) approximation is proposed, with a simultaneous inclusion of additional …

The theory of superconducting pairing due to antiferromagnetic exchange is considered.
The strong dependence of the superconducting transition temperature T c on the lattice …

Frequency dependent conductivity σ (ω) is calculated for the t− J model by applying the
memory function technique in terms of the Hubbard operators. The relaxation rate due to …

Рассматривается микроскопическая теория сверхпроводимости в рамках pd-модели
Хаббарда для плоскости СuО 2. На основе проекционной техники для матричной …