Weak- and strong-coupling expansions for
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J. Wagner; R. Putz; B. Ehlers; L. Lilly; A. Muramatsu; W. Hanke
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Article
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1989
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Elsevier Science
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English
β 123 KB
Pairing mediated by charge-transfer and magnetic fluctuations is examined for a two-component (d and p) Hubbard model in 2D with hopping (tnd),Short-range on-site (Ud,UD) and nearest-neighbor (Vc) repulsive interactions within (a) the randBm-phase approximation and (b) a strong coupling (tnd<E U d)