1996/06/28 by D. J. Scalapino, Scalapino, D. J.
Physics and Astronomy · #Condensed Matter (cond-mat) #FOS: Physical sciences #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/9606218
Latex, uses lprocldpf and epsf, 16 pages and 19 figures, to be published in the proceedings of the BICAS Summer School on "Symmetry of the Order Parameter in High-Temperature Superconductors" held in Ankara on June 17-22, 1996
arxiv created 1996/06/28 · arxiv updated 2009/11/30
Here we examine various aspects of the pairing mechanism for two models, the two-dimensional and two-leg ladder Hubbard models. Both of these models exhibit pairing correlations with dx2-y2 symmetry. However, the undoped insulating states of these two systems are different with the two-dimensional lattice characterized by a ground state with long-range antiferromagnetic order and the two-leg ladder having a spin gap in its ground state. Our aim is to gain a better understanding of the underlying pairing mechanism which causes dx2-y2 pairing in these two models.