Theoretical Investigation of Superconducting State Parameters of Binary Metallic Glasses Cu_{1-c}Sn_c


Abstract: Superconducting state parameters (SSP) viz. electron-phonon coupling strength \lambda, Coulomb pseudopotential \mu^*, transition temperature T_C, isotope effect exponent \alpha and effective interaction strength N_O V of seven Cu_{1-c} Sn_c binary metallic glasses have been reported using Ashcroft's empty core (EMC) model potential for the first time. 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. The T_C obtained from H-local field correction function are found in qualitative agreement with available experimental data and show linear nature with the concentration c of element Sn. A linear T_C equation is proposed by fitting the present outcomes for H-local field correction function, which is in conformity with other results for the experimental data. Also, the present results are found in qualitative agreement with other such earlier reported data, which confirms the superconducting phase in the metallic glasses.

Keywords: Pseudopotential; superconducting state parameters; binary metallic glasses

Full Text: PDF