Gossamer Superconductivity near Antiferromagnetic Mott Insulator in Layered Organic Conductors
arXiv:cond-mat/0409482 · doi:10.1103/PhysRevLett.94.067005
Abstract
Layered organic superconductors are on the verge of the Mott insulator. We use Gutzwiller variational method to study a Hubbard model including a spin exchange coupling term. The ground state is found to be a Gossamer superconductor at small on-site Coulomb repulsion U and an antiferromagnetic Mott insulator at large U, separated by a first order phase transition. Our theory is qualitatively consistent with major experiments reported in organic superconductors.
5 pages, 3 figures