Interstitial electron (hole) pairs in quasi-two-dimensional lattice of cuprates. Part II

In the paper Schrodinger equation is solved for intersite pairs of electrons (holes) with truncated interaction potential. It is shown that within framework of studied model, in contrary to Cooper's scenarios of pairing, pairing the electrons with equal momentum →k1=→k2=→ο/2 (where →ο total momentum of pair) is favourable. Criterions of forming of electron (holes) pairs with s, p and d symmetries of wave functions at Γ -point are obtained. (authors)