Magnetic electron-hole asymmetry in cuprates: a computational revisit
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866917093001134080 |
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| author | Mei, Jiong Shi, Shao-Hang Xu, Ping Chen, Ziyan Jin, Hui-Ke Qin, Mingpu Li, Zi-Xiang Jiang, Kun |
| author_facet | Mei, Jiong Shi, Shao-Hang Xu, Ping Chen, Ziyan Jin, Hui-Ke Qin, Mingpu Li, Zi-Xiang Jiang, Kun |
| contents | In this work, we revisit the electron-hole asymmetry of antiferromagnetism in cuprates by studying the three-band Emery model. Using parameters relevant to La$_2$CuO$_4$, we benchmark the anti-ferromagnetic response for a large range of dopings with variational Monte Carlo, determinant quantum Monte Carlo, constrained-path auxiliary-field quantum Monte Carlo, density-matrix embedding theory, and the Gutzwiller approximation. Across methods and accessible sizes/temperatures, we find no significant electron-hole asymmetry if we consider only Neel anti-ferronagnetic response and ignore other possible orders such as stripe state. This result is robust to a moderate oxygen-site repulsion $U_p$ and to parameter sets of Nd$_2$CuO$_4$. Incorporating dopant-induced local potentials reveals an extrinsic route to asymmetry: Cu-site defects enhance AFM on the electron-doped side, whereas O-site defects suppress it on the hole-doped side. These results indicate that dopant-driven effects make a non-negligible contribution to apparent electron-hole asymmetry in the general phase diagram of cuprates and should be included when analyzing competing orders in cuprates. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_15608 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnetic electron-hole asymmetry in cuprates: a computational revisit Mei, Jiong Shi, Shao-Hang Xu, Ping Chen, Ziyan Jin, Hui-Ke Qin, Mingpu Li, Zi-Xiang Jiang, Kun Strongly Correlated Electrons In this work, we revisit the electron-hole asymmetry of antiferromagnetism in cuprates by studying the three-band Emery model. Using parameters relevant to La$_2$CuO$_4$, we benchmark the anti-ferromagnetic response for a large range of dopings with variational Monte Carlo, determinant quantum Monte Carlo, constrained-path auxiliary-field quantum Monte Carlo, density-matrix embedding theory, and the Gutzwiller approximation. Across methods and accessible sizes/temperatures, we find no significant electron-hole asymmetry if we consider only Neel anti-ferronagnetic response and ignore other possible orders such as stripe state. This result is robust to a moderate oxygen-site repulsion $U_p$ and to parameter sets of Nd$_2$CuO$_4$. Incorporating dopant-induced local potentials reveals an extrinsic route to asymmetry: Cu-site defects enhance AFM on the electron-doped side, whereas O-site defects suppress it on the hole-doped side. These results indicate that dopant-driven effects make a non-negligible contribution to apparent electron-hole asymmetry in the general phase diagram of cuprates and should be included when analyzing competing orders in cuprates. |
| title | Magnetic electron-hole asymmetry in cuprates: a computational revisit |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2511.15608 |