Charge order in BiO2 planes of bismuth-based high-temperature superconductors
Jan Bal/a, Andrzej M. Oleś
DOI 10.1103/PhysRevB.47.15177 · Physical Review B
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Abstract
We present a model study of the ground state of a BiO2 plane of bismuth-based high-temperature superconductors using an extended three-band Hubbard model in which the hole correlations are treated by a local ansatz method. It is found that the doped holes have ∼65% oxygen character for realistic parameters, similarly as within a CuO2 plane of copper-based superconductors. The calculated phase diagrams demonstrate that the charge order is stable for nearly degenerate Bi(6s) and O(2p) levels and disappears gradually with hole doping for realistic parameters.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
| BaPb1-xBixO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13 | Pressure not reported | unknown |
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