Screening dependence of superconducting state parameters of Cu-Zr binary metallic glasses

Screening dependence investigations of the superconducting state parameters (SSP), namely the electron-phonon coupling strength λ, Coulomb pseudopotential μ*, transition temperature TC, isotope effect exponent α and effective interaction strength NOV of ten binary CuCZr100-C (C = 0.25,0.30,0.33,0.35,0.40,0.45,0.50,0.55,0.57 and 0.60) metallic glasses have been reported using Ashcroft's empty core (EMC) model potential. Five local field correction functions proposed by Hartree (H), Taylor (T), Ichimaru-Utsumi (IU), Farid et al (F) and Sarkar et al (S) are used in the present investigation to study the screening influence on the aforesaid properties. It is observed that the electron-phonon coupling strength λ and the transition temperature TC are quite sensitive to the selection of the local field correction functions, whereas the Coulomb pseudopotential μ*, isotope effect exponent α and effective interaction strength NOV show weak dependences on the local field correction functions. The TC obtained from the H-local field correction function is found to be in qualitative agreement with available theoretical or experimental data and shows an almost linear nature with the concentration C of the element Cu. A linear TC equation is proposed by fitting the present outcomes for the H-local field correction function, which is in conformity with other results for the experimental data. Also, the present results are found to be in qualitative agreement with other such data earlier reported, which confirms the superconducting phase in the metallic glasses