8 papers
Two-hole problem in the t-J model: A canonical transformation approach
V. I. Belinicher, A. L. Chernyshev, V. A. Shubin
The t-J model in the spinless-fermion representation is studied. An effective Hamiltonian for the quasiparticles is derived using canonical transformation approach. It is shown tha…
Single hole dispersion relation for the real CuO plane
V. I. Belinicher, A. L. Chernyshev, V. A. Shubin
Dispersion relation for the CuO hole is calculated basing on the {\it generalized} -- model, recently derived from the three-band one. Numerical ranges for al…
Generalized -- model: parameters and single-particle spectrum for electrons and holes in copper oxides
V. I. Belinicher, A. L. Chernyshev, V. A. Shubin
A microscopically based Hamiltonian of the generalized -- model is presented. Two types of the additional -terms are discussed. The set of ranges of the a…
Hole-hole superconducting pairing in the t-J model induced by spin-wave exchange
V. I. Belinicher, A. L. Chernyshev, A. V. Dotsenko +1
We study numerically the hole pairing induced by spin-wave exchange. The contact hole-hole interaction is taken into account as well. It is assumed that antiferromagnetic order is…
Hole-Hole Contact Interaction in the t-J Model
A. L. Chernyshev, A. V. Dotsenko, O. P. Sushkov
Using an analytical variational approach we calculate the hole-hole contact interaction on the Néel background. Solution of the Bethe-Salpeter equation with this interaction gives…
Consistent low-energy reduction of the three-band model for copper oxides with O-O hopping to the effective t-J model
V. I. Belinicher, A. L. Chernyshev
A full three-band model for the CuO plane with inclusion of all essential interactions - Cu-O and O-O hopping, repulsion at the copper and oxygen and between them - is consid…