Superconducting State Parameters of Cu_CZr_100-C Binary Amorphous Alloys by Pseudopotential Approach

We present the screening dependence theoretical investigations of the
superconducting state parameters, i.e. electron--phonon coupling strength
α, Coulomb pseudopotential μ*, transition temperature T_c, isotope effect exponent α, and effective interaction strength N₀V of some Cu_CZr_100-C (C=25, 30, 33, 35, 40, 45, 50, 55, 57, 60 at.%) binary amorphous alloys by employing the well-known empty core model potential of Ashcroft. Five screening functions proposed by Hartree, Taylor, Ichimaru-Utsumi, Farid et
al. and Sarkar it et al. are used to study the screening influence on the aforesaid superconducting properties. The transition temperature T_c obtained from the Ichimaru-Utsumi screening function is found to be in excellent agreement with available theoretical or experimental data. Also, the present results are found in qualitative agreement with the other earlier reported data, which confirms the superconducting phase in the amorphous alloys.