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Effects of Spin Fluctuations and Superconductivity in Quasi-One-Dimensional Organic Conductors

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Abstract

We study the electronic states using the single band Hubbard model at half-filling. We treat the effects of the on-site Coulomb interaction by the fluctuation-exchange (FLEX) method, and calculate the phase diagram and physical properties. The calculated pressure dependence of the magnetic transition temperature coincides well with the experimental one. We also show that a pseudogap is formed in the density of states near the chemical potential and that the NMR relaxation rate increases on cooling in the low-temperature region, and that d-wave superconductivity appears next to the antiferromagnetic state.

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Authors and Affiliations

  1. Institute for Solid State Physics, University of Tokyo, 7-22-1 Roppongi, Minato-ku, Tokyo, 106-8666

    Hiori Kino & Hiroshi Kontani

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  1. Hiori Kino
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  2. Hiroshi Kontani
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Kino, H., Kontani, H. Effects of Spin Fluctuations and Superconductivity in Quasi-One-Dimensional Organic Conductors. Journal of Low Temperature Physics 117, 317–321 (1999). https://doi.org/10.1023/A:1022505330043

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