Increase in $d$-Wave Superconducting Transition Temperature near Imperfect Layer in Correlated Electron System

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概要

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• The effect of the site potential in an imperfect layer is studied in a $d$-wave layer superconductor on the basis of the electron correlation. The site potential binds electrons to the imperfect layer, and then, the superconductivity of the imperfect layer is independent of that of the bulk. We found that the superconducting transition temperature of the imperfect layer becomes higher than that of the bulk owing to the effect of the site potential. In this situation, the Fermi surface of the imperfect layer has a strong nesting feature leading to increases in both the antiferromagnetic spin fluctuation and the density of states near the Fermi level, which are in favor of $d$-wave pairing.

• Physical Society of Japanの論文
• 2009-11-15

著者

• Shima Nobuyuki

  Graduate School of Material Science, University of Hyogo, 3-2-1 Koto, Kamigori, Hyogo 678-1297

• Kaneyasu Hirono

  Graduate School of Material Science, University of Hyogo, 3-2-1 Koto, Kamigori, Hyogo 678-1297

• Nobukuni Tetsu

  Graduate School of Material Science, University of Hyogo, 3-2-1 Koto, Kamigori, Hyogo 678-1297

• Makoshi Kenji

  Graduate School of Material Science, University of Hyogo, 3-2-1 Koto, Kamigori, Hyogo 678-1297

関連論文

• Two-Copper-Atom Units Induce a Pseudo Jahn-Teller Polaron in Hole-Doped Cuprate Superconductors(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
• Increase in $d$-Wave Superconducting Transition Temperature near Imperfect Layer in Correlated Electron System

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