Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apartado Postal 70-360, 04510, Mexico D.F., Mexico
Abstract:
In order to understand the mechanism that gives rise to superconductivity in the ceramic superconductors of the type BaxK1 ? xBiO3, we analyze the thermodynamic properties with the use of the Eliashberg equations. For these calculations we used the electron-phonon spectral density function 2(ω)F(ω), calculated by Shirai et al. 1] from first principles for two different K concentrations, x=0.5 and x=0.7.