Incommensurate charge-density-wave instability in the extended three-band Hubbard model

Article

关键词: T-J MODEL;    ANGLE-RESOLVED PHOTOEMISSION;    ELECTRONIC SPECIFIC-HEAT;    O-BASED SUPERCONDUCTORS;    PHASE-SEPARATION;    CUPRATE SUPERCONDUCTORS;    NORMAL-STATE;    ANDERSON MODEL;    3-BAND MODEL;    CUO2 PLANE;   

DOI  :  10.1103/PhysRevB.57.4382

来源: SCIE

【 摘 要 】

The infinite-U three-band Hubbard model is considered in order to describe the CuO2 planes of the high-temperature superconducting cuprates. The charge instabilities are investigated when the model is extended with a nearest-neighbor repulsion between holes an copper d and oxygen p orbitals and in the presence of a long-range Coulombic repulsion. It is found that a first-order valence instability line ending with a critical point is present as in the previously investigated model without long-range forces. However, the dominant critical Instability is the formation of incommensurate charge-density waves, which always occur before the valence-instability critical point is reached, An effective singular attraction arises in the proximity of the charge-density wave instability, accounting for both a strong pairing mechanism and for the anomalous normal-state properties. [S0163-1829(98)00607-9].

【 授权许可】

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