Two-band hubbard model for copper oxide superconductors

✍ Scribed by Kazuhiko Kuroki; Hideo Aoki

• Book ID: 104356221
• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 302 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(09)80091-4

✦ Synopsis

Results for the superconductivity specific to strongly correlated two-band systems in a two-band Hubbard model is presented to elucidate effects of doping and band width from both intuitive considerations and quantum Monte Carlo results. Fig. 1. When 2V > U + F, the configuration with two carriers in the same (3 orbital(a) is eneq~etically more favourable than when they are separated(b).

fleeted in an oscillation in the density-density correlation function. The orbital occupancy correlation, «(nr -(na»(n~-(n/3»), exhibits no appreciable structure.

Important differences from the 'd-p' model reside in the fact that we pick up the most relevant orbitals and we also consider more than one orbital for Cu(3d), for which the Cooper pairing is realized from quite a subtle balance in intra-and inter-molecular-orbital interaction energies.