Gossamer Superconductivity near Antiferromagnetic Mott Insulator in Layered Organic Conductors

Details Gossamer Superconductivity near Antiferromagnetic Mott Insulator in Layered Organic Conductors Gossamer Superconductivity near Antiferromagnetic Mott Insulator in Layered Organic Conductors

2004-09-18

arxiv.org/abs/cond-mat/0409482v1

Phys. Rev. Lett. 94, 067005 (2005).

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.94.067005

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.

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