The electronic structure of BaPb1-xBixO3 is calculated taking into account the local disproportionation of the Bi atoms within 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 interpretation of the optical properties, resistivity, Hall, and Seebeck measurements. The agreement is improved when the many-body effects due to the covalency of the Bi-O bonding, invoked previously for the superconductivity, are also considered.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics