Phase separation, charge-transfer instability, and superconductivity in the three-band extended Hubbard model: Weak-coupling theory
Yunkyu Bang, G. Kotliar, C. Castellani, M. Grilli, R. Raimondi
DOI 10.1103/PhysRevB.43.13724 · Physical Review B
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Abstract
We study the interplay of charge-transfer instability and phase separation in the three-band model using the Hartree-Fock variational method for values of the interaction couplings comparable to the bandwidth. We establish that phase separation occurs near the region where previous weak-coupling calculations found s-wave superconductivity and a charge-transfer instability.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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