Nb-Cu多层膜超导体临界温度的计算

对于Nb-Cu多层膜超导体临界温度T_cns的无调节参数数值计算表明,在充分考虑多层膜体系的周期性特点之后,在层厚d>30?的范围内邻近效应的理论和实验符合较好。计算结果和实验的比较还表明:T_cns-d关系中存在阻尼振荡行为;界面电子结构可能只在d<30?的范围内对T_cns有明显的影响,并且强异质界面对Nb的(NV)有加强作用。 关键词：

THE CALCULATION OF CRITICAL TEMPERATURE FOR Nb-Cu MULTILAYER FILM SUPERCONDUCTOR

The calculation of critical temperature for Nb-Cu multilayer film superconductor without any adjustable parameter shows that as the periodic character of multilayer film is considered, the theory of proximity effect agrees reasonably with experiment within the range of layer thickness d>30?.It is also shown that there exists damped oscillation in the dependence of critical temperature T_cns on d, the electronic structure of interface between Nb and Cu has obvious influence upon T_cns only when d<30? and the strong heterogeneous interface probably increases the (NV) of Nb.
Keywords：