STUDY OF SUPERCONDUCTING STATE PARAMETERS OF TRANSITION METALS BINARY ALLOYS BY A PSEUDOPOTENTIAL APPROACH

摘要

In the present article, we have reported the theoretical study of the superconducting state parameters (SSP) viz. electron-phonon coupling strength λ, Coulomb pseudopo_ tential μ~* , transition temperature T_C, isotope effect exponent a and effective interaction strength N_0V of a 3d-transition metal-based binary alloys 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. A considerable influence of various exchange and correlation functions on A and μ~* is found from the present study. The present results of the SSP are found in qualitative agreement with the available experimental data wherever they exist.