【摘要】 本文利用二交迭能带理论，计算费米面附近电子态密度的Ｖａｎ－Ｈｏｖｅ奇异性对超导转变温度和同位素指数因子的影响，计算结果表明：费米面附近电子态密度的Ｖａｎ－Ｈｏｖｅ奇异性能同时提高超导转变温度和降低同位素指数因子，这是普通的ＢＣＳ理论不能解释的［３］．更多还原

【Abstract】 Abstract By using two overlapping energy bands theory, we caculate the effect of Van-Hone singularity of the density of electionic state near Fermi surface on the transition temperature and the istope effect. The results show that the Van-Hove singularity of electronic state near Fermi surface can enhance transition temperature and decrease isopope-mass exponent. It can’t be explained by usual BCS theory.更多还原