Properties of a diagonal 2-orbital ladder model of the Fe-pnictide superconductors
arXiv:0912.0277 · doi:10.1103/PhysRevB.81.172504
Abstract
We study a diagonal 2-orbital ladder model of the Fe based superconductors using the density matrix renormalization group method. At half filling, we find a close competition between a "spin-striped" state and a non-collinear "spin-checkerboard" state, as well as significant nematic correlations. Upon finite hole or electron doping, the dominant pairing correlations are found to have A$_{1,g}$ ($S-$wave) symmetry.
4 pages, 5 figures; Published version