【摘要】 本文定出超导临界温度T_c级数公式（1）的前几项系数。对于形式为 α₂F（ω）=λω/2[a₁δ（ω-ω₁）+（1-a₁）δ（ω-ω₂）]的双δ型有效声子谱及若干具体材料的谱,将级数公式计算的T_c与Allen-Dynes公式（以下简称A-D公式）及Eliashberg方程的数值解作了比较。计算表明,当级数（1）收敛时,级数公式计算的结果较A-D公式更接近于数值解。 此外,本文还给出了一个近似的T_c级数公式,得到了估计该T_c级数收敛半径的方法,并计算了若干材料的收敛半径值。因此,可估计级数公式（1）的适用范围。更多还原

【Abstract】 We have determined the first several coefficients of the series formula (1) for superconducting Tc. For the double-σ spectrum as and that of several real materials, we have compared the Tc calculated from the series formula, the Allen-Dynes formula and the numerical solution of the Eliashberg Equation, respectively. The results suggest that when the series is convergent, the calculated results by using the series formula is a better approximation of the numerrieal solution than that from the A-D formula.We have also given an approximate To series formula, obtained a method to estimate the convergent radius of the To series and calculated the convergent radius for several materials. Therefore we may estimate the region in which the series formula (1) is valid.更多还原