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- W2012873513 abstract "We study a model proposed before to give rise to a nonconventional pairing mechanism in ${mathrm{BaPb}}_{1mathrm{ensuremath{-}}mathit{x}}$${mathrm{Bi}}_{mathit{x}}$${mathrm{O}}_{3}$ and ${mathrm{Ba}}_{1mathrm{ensuremath{-}}mathit{x}}$${mathrm{K}}_{mathit{x}}$${mathrm{BiO}}_{3}$. This model, in which both phonons and electronic excitations play an essential role, is supported by experimental evidence. We solve exactly a ${mathrm{BiO}}_{6}$ cluster and we calculate the interaction between this cluster and the rest of the system using perturbation theory in the hopping term. The holes introduced by doping form groups of n holes where n depends essentially on the values of the electron-phonon interaction, Bi-O repulsion, and Bi-O hopping. n=2 is favored near the limit at which the disproportionated ground state becomes unstable." @default.
- W2012873513 created "2016-06-24" @default.
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- W2012873513 date "1993-06-01" @default.
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- W2012873513 title "Pairing and phase separation inBiO3-based superconductors" @default.
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- W2012873513 doi "https://doi.org/10.1103/physrevb.47.14380" @default.
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