Single-particle pseudogap in two-dimensional electron systems

Shigeki Onoda*, Masatoshi Imada

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We investigate pseudogap phenomena in the 2D electron system. Based on the mode-mode coupling theory of antiferromagnetic (AFM) and dx2-y2-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, ω) around the wave vector (π, 0) and (0, π) below the spin pseudogap temperature TPG 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.

Original languageEnglish
Pages (from-to)312-315
Number of pages4
Journaljournal of the physical society of japan
Issue number2
Publication statusPublished - 2000 Feb
Externally publishedYes


  • High-T superconductivity
  • Pairing fluctuations
  • Pseudogap
  • Spin fluctuations

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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