Effect of the local charge disproportionation on the electronic structure of BaPb1-xBixO3

J. O. Sofo, A. A. Aligia, M. D. Nuez Regueiro

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Abstract

We calculate the electronic structure of BaPb1-xBixO3 within a simplified version of a model proposed before for the superconductivity, taking into account the local disproportionation of the Bi atoms in the coherent potential approximation. Three different regimes are obtained as a function of the Bi concentration x: normal metal, metallic with a pseudogap, and insulating phase. This allows a satisfactory explanation of the optical properties, resistivity, Hall, and Seebeck effects. The agreement is improved when the many-body effects due to the covalency of the Bi-O bonding, invoked for the pairing mechanism, are also considered.

Original languageEnglish (US)
Pages (from-to)6955-6962
Number of pages8
JournalPhysical Review B
Volume40
Issue number10
DOIs
StatePublished - Jan 1 1989

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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