TY - JOUR
T1 - Effect of the local charge disproportionation on the electronic structure of BaPb1-xBixO3
AU - Sofo, J. O.
AU - Aligia, A. A.
AU - Nuez Regueiro, M. D.
PY - 1989/1/1
Y1 - 1989/1/1
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.40.6955
DO - 10.1103/PhysRevB.40.6955
M3 - Article
AN - SCOPUS:33744600840
VL - 40
SP - 6955
EP - 6962
JO - Physical Review B
JF - Physical Review B
SN - 0163-1829
IS - 10
ER -