The Influence of the Singularity-Enhanced Density of States on the Isotope Effect in a Bond Asymmetric Model for a Cu-O Based High-T_C Superconductor : Condensed Matter and Statistical Physics

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概要

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• In a Cu-O based high-T_C superconductor, we investigate possible singularities in the density of states of a bond asymmetric model with intralayer hoppings between nearest and next nearest neighbor O-sites and extremely small interlayer hopping. A combination of such hoppings and the bond asymmetry leads to various types of singularities. By considering the Debye cutoff dependence of T_C, we point out that the singularity-enhanced density of states induces an interesting chemical potential dependence of the isotope effect.

• 理論物理学刊行会の論文
• 1990-03-25

著者

• Tomita K

  Yukawa Institute For Theoretical Physics Kyoto University

• SEKI Seiichi

  Department of Physics, Saitama University

• Tanabe Kosai

  Department Of Physics Saitama University

• Tanabe Kosai

  Department Of Physics College Of Liberal Arts Saitama University

• Seki Seiichi

  Department Of Physics Faculty Of Science Saitama University

• Tomita Kenji

  Research Institute For Theoretical Physics Hiroshima Unviersity

• Tomita Kenji

  Research Institute For Theretical Physics Hiroshima University

• Tomita Kenji

  Research Institute Of Theoretical Physics Hiroshima University

• TANABE Kenji

  Research Institute for Theoretical Physics, Hiroshima University

• TOMITA Koji

  Tokyo Development Center Yaskawa Electric MFG.Co.,LTD

• TOMITA Koji

  Department of Physics, Kyushu Uniersity

• TOMITA Kenji

  Uji Reseach Center, Yukawa Institute for Theoretical Physics Kyoto University

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