High-temperature superconductivity in cuprates and a Wigner lattice of electron pairs

A model of high-temperature superconductivity in cuprates where delocalization of one-dimensional Wigner lattices of electron pairs is responsible for superconductivity is suggested. The milestones of the model are as follows:1.Symmetric polarization of oxygen ions in the CuO2 layer by two neighboring copper ions leading to formation of one-electron σ bonds between the ions.2.Asymmetric polarization of oxygen ions in the electric field around a CuO2 layer resulting in the excitation of singlet electron pairs of oxygen ions from the 2pz state into a (2pz3s) state, the singlet nature of the pair being preserved.3.Lowering of the CuO2 layer symmetry under doping and formation of quasi-one-dimensional chains of copper and oxygen ions bound by one-electron σ bonds.4.Formation of one-dimensional Wigner lattices of electron pairs due to a strong Coulomb interaction between these pairs.5.Formation of delocalized π orbitals along ion chains and delocalization of Wigner lattices of electron pairs at the temperature regarded as the temperature of transition to superconductivity.The model allows one to explain the co-existence of superconductivity and magnetism, orbital ion ordering, the role of local lattice distortions, the stripe structure of the electron density, and a quasi-one-dimensional character of superconductivity.