Analysis of electronic parameters of magnesium diboride superconductor

In this paper, a quantitative analysis of observed parameters is taken into account that influences superconducting state of Al and C doped MgB2. The analysis assumes a three square well model with three interactions namely, the Coulomb’s, the electron phonon and the electron-charge fluctuations. The relevant energy gap expressions in the formalism are solved imposing experimental constraints on their solutions. It is found that the indirect-exchange formalism provides a unique set of electronic parameters [electron-phonon (λσσph), electron-charge fluctuations (λσσpl), electron-electron (μσσ) and Coulomb screening parameter (μσσ*)]. It is shown that the addition of electron to Mg1-xAlxB2 [Mg(B1-yCy)2] through the partial substitution of C for B and Al for Mg results in the loss of superconductivity.