QUASI-PARTICLE BANDS AND SUPERCONDUCTIVITY IN BILAYER CUPRATES

Citation
Ai. Liechtenstein et al., QUASI-PARTICLE BANDS AND SUPERCONDUCTIVITY IN BILAYER CUPRATES, Physical review. B, Condensed matter, 54(17), 1996, pp. 12505-12508
Citations number
28
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
01631829
Volume
54
Issue
17
Year of publication
1996
Pages
12505 - 12508
Database
ISI
SICI code
0163-1829(1996)54:17<12505:QBASIB>2.0.ZU;2-T
Abstract
We analyze the generic features of the energy spectrum for two coupled CuO2 layers with a realistic extended Hubbard model. The quasiparticl e bands exhibit flat regions near X(Y) points in the Brillouin zone wi th a large reduction of the bonding-antibonding splitting and pinning of extended van Hove singularity to the Fermi level, which is more eff icient for bilayers than for a single layer. In contrast to the result s with simpler models, the superconducting temperature for d(x2-y2) pa iring is not lowered by the bilayer hopping.