title: Gossamer superconductivity near antiferromagnetic Mott insulator in layered organic conductors.
abstract: Layered organic superconductors are on the verge of the Mott insulator. We use the Gutzwiller variational method to study a two-dimensional Hubbard model including a spin exchange coupling term as a minimal model for the compounds. 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.
authors.affiliation: Institute for Theoretical Physics, Chinese Academy of Sciences, Beijing, 100080, China.
authors.forename: J Y
authors.initials: JY
authors.lastname: Gan
authors.forename: Yan
authors.initials: Y
authors.lastname: Chen
authors.forename: Z B
authors.initials: ZB
authors.lastname: Su
authors.forename: F C
authors.initials: FC
authors.lastname: Zhang