Pseudogap in electron-doped cuprates: thermal precursor to magnetism
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866911118314700800 |
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| author | Kokkinis, Emmanouil K. Chubukov, Andrey V. |
| author_facet | Kokkinis, Emmanouil K. Chubukov, Andrey V. |
| contents | 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 beyond Eliashberg approximation. 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 thermal fluctuations almost cancel out in the gap equation, even when the self-energy is obtained beyond the Eliashberg approximation. We favorably compare our results with recent ARPES study [K-J Xu et al, Nat. Phys. 19, 1834-1840 (2023)]. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2505_11727 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Pseudogap in electron-doped cuprates: thermal precursor to magnetism Kokkinis, Emmanouil K. Chubukov, Andrey V. Strongly Correlated Electrons 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 beyond Eliashberg approximation. 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 thermal fluctuations almost cancel out in the gap equation, even when the self-energy is obtained beyond the Eliashberg approximation. We favorably compare our results with recent ARPES study [K-J Xu et al, Nat. Phys. 19, 1834-1840 (2023)]. |
| title | Pseudogap in electron-doped cuprates: thermal precursor to magnetism |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2505.11727 |