BCS-van Hove方案与高温超导电性

THE van HOVE SCENARIO AND THE HIGH-T_c SUPERCONDUCTIVITY

基于BCS—van Hove机制,研究了非磁杂质对高温超导电性的抑制效应,考虑到双层耦合效应和三维耦合效应,将van Hove方案推广到多带BCS模型,计算了超导转变温度与化学势的关系,并与实验结果进行了比较。

The suppressive effect of the nonmagnetic doping on the high- Tc superconductivity has been studied based on the BCS-van Hove mechanism. Taking into account the bilayer coupling and three-dimensionality effects, we generalize the van Hove scenario into the multiband BCS model and calcu-late the relation between the transition temperature and the chemical potential. The results obtained are in good agreement with the experiments.