Reconsideration of the doping effect on high-T-c superconductivity

Studying the change of the cuprate's crystal structure based on doping and then the effect on its high-T-c superconductivity, is an effective way to s eek the mechanism of superconductivity We explore the doping effect in the cuprate's crystal structure, such as the property of Cu-O layers, the inter layer spacing, the density of carriers and so on. Then, by considering the effect of the nuclear spin, we construct a three-dimensional superconductiv ity model, which is a correction of the nonphonon mechanism in a layered Fe rmi-Liquid.