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Gossamer Superconductivity near Antiferromagnetic Mott Insulator in Layered Organic Conductors

J. Y. Gan·Yan Chen·Z. B. Su·F. C. Zhang
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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.

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J. Y. Gan, Yan Chen, Z. B. Su, F. C. Zhang. 2004-09-18. Gossamer Superconductivity near Antiferromagnetic Mott Insulator in Layered Organic Conductors. https://doi.org/10.1103/physrevlett.94.067005

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