Single-Particle Pseudogap in Two-Dimensional Electron Systems : Condensed Matter: Electronic Properties, etc.

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概要

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• We investigate preudogap phenomena in the 2D electron system. Based on the mode-mode coupling theory of antiferromagnetic (AFM) and d_<x^2-y^2>-wave superconducting (dSC) fluctuations, single-particle dynamics is analyzed. For the parameter values of underdoped cuprates, pseudogap structure grows in the single-particle spectral weight A(k, w) around the wave vector (π, 0) and (0, π) below the spin pseudogap temperature T_<PG> signaled by the reduction of dynamical spin correlations in qualitative agreement with the experimental data. The calculated results on A(k, ω) for the overdoped cuprates also reproduce the absence of the pseudogap in the experiments. We also discuss limitations of our mode-mode coupling approach.

• 社団法人日本物理学会の論文
• 2000-02-15

著者

• Onoda Shigeki

  Institute For Solid State Physics

• IMADA Masatoshi

  University of Tokyo

関連論文

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• Operator Projection Method Applied to the Single-Particle Green's Function in the Hubbard Model : Condensed Matter: Electronic Properties, etc.
• 12pZA-3 Parameters of Hubbard model from the first principles(English Session)
• Filling-Control Metal-Insulator Transition in the Hubbard Model Studied by the Operator Projection Method

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