SCREENING DEPENDENCE OF SUPERCONDUCTING STATE PARAMETERS OF BINARY-ALLOYS

Screening dependence of transition temperature T-c of In-based alloys of six:elements at different compositions has been studied by employin g linear potential due to Sharma and Kachhava (Solid State Commun, 30 (1979) 749). It is observed that out of the nine different forms of th e dielectric screening used, RPA and modified Hubbard forms of the scr eening provide the best agreement with the experimental data as well a s with the other theoretical results on other potentials. Values of is otope effect exponent a and interaction strength N-0 V have also been reported for these alloys by using RPA and modified Hubbard forms of s creening, providing best T-c values with the linear potential. It is o bserved that an overall best explanation of superconducting state para meters of In-based alloys is provided by RPA form of screening.