Quasiparticle bands and superconductivity in bilayer cuprates
Condensed Matter
2007-05-23 v1
Abstract
We analyze the generic features of the energy spectrum for two coupled CuO layers with a realistic extended Hubbard model. The quasiparticle bands exhibit flat regions near X(Y) points in the Brillouin zone with a large reduction of the bonding-antibonding splitting, and pinning of extended van-Hove singularity to the Fermi level, which is more efficient for a bi-layers than for a single layer. In contrast to the results with simpler models, the superconducting temperature for d pairing is not lowered by the bi-layer hopping.
Keywords
Cite
@article{arxiv.cond-mat/9509101,
title = {Quasiparticle bands and superconductivity in bilayer cuprates},
author = {A. I. Liechtenstein and O. Gunnarsson and O. K. Andersen and R. M. Martin},
journal= {arXiv preprint arXiv:cond-mat/9509101},
year = {2007}
}
Comments
Submitted to PRL, 4 pages, 5 eps-figures for Latex2e