Physics – Condensed Matter – Superconductivity
Scientific paper
2012-01-31
Physics
Condensed Matter
Superconductivity
Scientific paper
Almost all the existing theories about cuprate superconductor imply a common hypothesis that, on CuO2 plane, the charge of Cu-O ions is opposite of that of carriers, and is homogenously distributed. In fact, the ion charge distributes on Cu-O ions with fixed position, and the position difference of Cu-O ions slightly violates homogenous electricity distribution. Around optimum doping, since the low concentration of ions, the violations can be treated as a perturbation. It is proved that, in such situation, the ion lattice can be seen as a combination of regular lattice and electronic dipole lattice. The electronic dipole lattice comes from the position difference of Cu-O ions, is the innate character of CuO2 plane. The character of cuprate superconductor, such as pairing mechanism, bell-shaped phase diagram, pseudogap, d-wave symmetry, and linear temperature dependence of normal state resistivity, is tersely interpreted in consideration of electronic dipole lattice, and can be seen as the proof of the existence of electronic dipole lattice.
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