Normal state and superconducting properties of the three-band hubbard model from quantum monte carlo simulations
✍ Scribed by G. Dopf; A. Muramatsu; W. Hanke
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 261 KB
- Volume
- 185-189
- Category
- Article
- ISSN
- 0921-4534
No coin nor oath required. For personal study only.
✦ Synopsis
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 very good agreement with experimental photoemission and inver~ photoemission data both for the location of the Fermi surface and for the Fermi velocity. Moreover, the interaction vertex for the pairing correlation function in the extended s-channel shows a maximum for 5 ,,. 20%, resembling the dependence of Tc on doping. This feature is not present for other symmetries of the order parameter or in other parameter regions.