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期刊论文
Effect of magnetic ion Ni doping for Cu in the CuO2 plane on electronic structure and superconductivity on Y123 cuprate
S. Cao et al. Physica C 388-389 (2003) 383-384，-0001，（）：
The YBa2Cu3-xNixO7-δ with x=0-0. 4 have been studied using positron annihilation technique. The changes of positron annihilation parameters with the Ni substitution concentration x are given. From the change of electronic density ne and Tc, it would prove that the localized carriers (electron and hole) in Cu-O chain and CuO2 planes have enormous influence on superconductivity by affecting charge transfer between the reservoir layer and CuO2 planes.
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