Abstract
A new method of numerical analysis is presented which allows the determination of the electron-phonon interaction function α2(ω)F(ω) using the experimental data obtained from a superconducting tunnel junction. This method utilizes the dispersion relation for Δ(ω) (complex energy gap function) proposed by Galkin, D'yachenko and Svistunov. The method and the hypotheses which allow the numerical solution of the first-kind integral equation derived from the Eliashberg equations are shown and discussed. Δ(ω) and α2(ω)F(ω) of Pb are obtained by applying this method to the tunnel data of an Al−Al2O3-Pb (superconducting electrode) junction. The results are discussed with particular reference to the stability and convergence of the method applied.
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