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The normal and superconducting states of the 2D Hubbard model

✍ Scribed by J. Beenen; D. M. Edwards


Book ID
104926790
Publisher
Springer US
Year
1995
Tongue
English
Weight
338 KB
Volume
99
Category
Article
ISSN
0022-2291

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πŸ“œ SIMILAR VOLUMES


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✍ T. Dahm; L. Tewordt πŸ“‚ Article πŸ“… 1995 πŸ› Elsevier Science 🌐 English βš– 863 KB

We have extended the previous fluctuation exchange approximation for the two-dimensional Hubbard model to a Fermi surface geometry approximating that of the YBazCu307\_y cuprates. In spite of the poor nesting of this Fermi surface we obtain a broad commensurate peak in the spectral density of the dy

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The two-dimensional Hubbard model has been studied within the Composite Operator Method (COM) [1] starting from a basis made of the two Hubbard composite fields in the Nambu representation and computing the residual self-energy in the non-crossing approximation (NCA) [2]. The charge-charge, spinspin

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✍ G. Dopf; A. Muramatsu; W. Hanke πŸ“‚ Article πŸ“… 1991 πŸ› Elsevier Science 🌐 English βš– 261 KB

## A set of parameters for the three-band Hubbard model is determlned by comparison of Quantum Monte C~lo results with experimental values for the charge transfer gap. With the obtained parameter set we have calculated the spectral function A(k,t~) for the one-particle Green's function. We find ve