Existence of electronic dipole lattice on CuO2 plane of cuprate superconductor

Abstract

The existing theory about the cuprate superconductor bases on band theory, almost all neglects the position difference of Cu-O ions on CuO2 plane, and assumes that the charge on ions are averagely distributed. Considering that the nature of conduction is the moving of electrons, carrier means electron in this article. The charge opposite the carriers distributes on fixed ions, and the position difference of Cu-O ions slightly violates average electricity distribution, so the concept of hole is not suitable. It is proved that, near the optimal doping level, since the density of ions is relatively low, the violations can be treated as a perturbation, and the ion lattice can be seen as a combination of regular lattice and dipole lattice. Considering about that the character of cuprate superconductor is mainly dominated by the dipole lattice, the pairing mechanism, the d-wave symmetry, and the linear temperature dependence of normal state resistivity is tersely interpreted.