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
The normal and superconducting states of the 2D Hubbard model
β 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
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
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
## 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