2004/09/18 by J. Y. Gan, Yan Chen, Z. B. Su +2 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Coulomb #Electrical resistivity and conductivity #Electron #Ground state #Hubbard model #Insulator (electricity) #Metal–insulator transition #Mott insulator #Organic and Molecular Conductors Research #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.94.067005
published as Phys. Rev. Lett. 94, 067005 (2005). · 5 pages, 3 figures
arxiv created 2004/09/18 · openalex publication_date 2005/02/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.