Superconducting State Parameters of NbxTayMoz Superconductors

• 来源期刊: 中国物理快报(英文版)
• 学科: 物理学
• 关键词: 超导体 状态参数 转变温度 校正功能 同位素效应 耦合强度 超导性能 理论数据
• 年，卷（期）: 2010,（2）
• 页码范围: 195-198
• 页数: 4页
• 分类号: O511 TU441
• 语种: 英文

摘要

We present screening dependence theoretical investigations of the superconducting state parameters, i.e. electron-phonon coupling strength λ, Coulomb pseudopotential μ*, transition temperature TC, isotope effect exponent α, and effective interaction strength N0V, of some BMG superconductors, namely Nb0.45Ta0.45Mo0.10, Nb0.30Ta0.40Mo0.30, Nb0.40Ta0.30Mo0.30, Nb0.30Ta0.30Mo0.40 and Nb0.15Ta0.15Mo0.70 by employing the well-known empty core model potential of Ashcroft for the first time. Five local field correction functions proposed by Hartree, Taylor, Ichimaru-Utsumi, Farid et al. and Sarkar et al. are used in the present investigation to study the screening influence on the aforesaid superconducting properties. The transition temperature TC obtained from the H-local field correction function is found to be in an excellent agreement with the available theoretical data. Also, the present results are found to be in qualitative agreement with other such earlier reported data, which confirms the superconducting phase in the superconductors.