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<p>We study pseudogap behavior in a metal near an antiferromagnetic instability and apply the results to electron-doped cuprates. We associate pseudogap behavior with thermal magnetic fluctuations and compute the fermionic self-energy along the Fermi surface in a weak pseudogap regime, which we justify. We analyze the spectral function as a function of frequency (energy distribution curves, EDC) and momentum (momentum distribution curves, MDC). We show that the EDC display pseudogap behavior with peaks at a finite frequency at all momenta. On the other hand, MDC peaks disperse within the pseudogap, ending at a gossamer Fermi surface. We analyze magnetically-mediated superconductivity and show that in a weak pseudogap regime thermal fluctuations almost cancel out in the gap equation. We favorably compare our results with recent ARPES studies.</p>

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Pseudogap in electron-doped cuprates as a thermal precursor to magnetism

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月24日

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  • Emmanouil K. Kokkinis,
  • Andrey V. Chubukov

摘要

We study pseudogap behavior in a metal near an antiferromagnetic instability and apply the results to electron-doped cuprates. We associate pseudogap behavior with thermal magnetic fluctuations and compute the fermionic self-energy along the Fermi surface in a weak pseudogap regime, which we justify. We analyze the spectral function as a function of frequency (energy distribution curves, EDC) and momentum (momentum distribution curves, MDC). We show that the EDC display pseudogap behavior with peaks at a finite frequency at all momenta. On the other hand, MDC peaks disperse within the pseudogap, ending at a gossamer Fermi surface. We analyze magnetically-mediated superconductivity and show that in a weak pseudogap regime thermal fluctuations almost cancel out in the gap equation. We favorably compare our results with recent ARPES studies.