Superconducting State Parameters of Nb_xTa_yMo_z Superconductors

We present screening dependence theoretical investigations of the superconducting state parameters, i.e. electronphonon coupling strength λ, Coulomb pseudopotential μ^*, transition temperature T_C, isotope effect exponent α, and effective interaction strength N₀V, of some BMG superconductors, namely Nb_0.45Ta_0.45Mo_0.10, Nb_0.30Ta_0.40Mo_0.30, Nb_0.40Ta_0.30Mo_0.30, Nb_0.30Ta_0.30Mo_0.40 and Nb_0.15Ta_0.15Mo_0.70 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 T_C 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.