Abstract
Within the Eliashberg theory we present an analysis of the electron-phonon coupling in the compound Ba 0.7 K 0.3 BiO 3. This analysis has been carried out evaluating the isotope coefficient (α), using the Rainer and Culetto approach and the electron-phonon spectra α 2( ω) F( ω) as calculated by Shirai et al. for the oxide superconductor Ba 0.7 K 0.3 BiO 3. With numerical calculations of some important BCS-ratios and the analysis of the isotope coefficient in this bismuthate, we outlined the importance of the electron-phonon coupling in this oxide superconductor.
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