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Fluctuation Exchange Analysis of Superconductivity in the Standard Three-Band CuO2 Model | G. Esirgen
; N. E. Bickers
; | Date: |
17 Nov 1997 | Journal: | G. Esirgen and N. E. Bickers, Phys. Rev. B 57, 5376 (1998). | Subject: | Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el | Abstract: | The fluctuation exchange, or FLEX, approximation for interacting electrons is applied to study instabilities in the standard three-band model for CuO2 layers in the high-temperature superconductors. Both intra-orbital and near-neigbor Coulomb interactions are retained. The filling dependence of the d(x2-y2) transition temperature is studied in both the "hole-doped" and "electron-doped" regimes using parameters derived from constrained-occupancy density-functional theory for La2CuO4. The agreement with experiment on the overdoped hole side of the phase diagram is remarkably good, i.e., transitions emerge in the 40 K range with no free parameters. In addition the importance of the "orbital antiferromagnetic," or flux phase, charge density channel is emphasized for an understanding of the underdoped regime. | Source: | arXiv, cond-mat/9711151 | Services: | Forum | Review | PDF | Favorites |
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