Magnetic phase diagram of the three-dimensional doped Hubbard model
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
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2024
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| author | Rampon, Liam Šimkovic IV, Fedor Ferrero, Michel |
| author_facet | Rampon, Liam Šimkovic IV, Fedor Ferrero, Michel |
| contents | We establish the phase diagram of the Hubbard model on a cubic lattice for a wide range of temperatures, dopings and interaction strengths, considering both commensurate and incommensurate magnetic orders. We use the dynamical mean-field theory together with an efficient method to compute the free energy which enable the determination of the correct ordering vectors. Besides an antiferromagnetic state close to half-filling, we identify a number of different magnetic spiral phases with ordering vectors $(q,π,π)$, $(q,q,π)$ and $(q,q,q)$ as well as a region with close competition between them, hinting at spatial phase separation or at the onset of a stripe phase. Additionally, we extensively study several thermodynamic properties with direct relevance to cold-atom experiments: the entropy, energy and double-occupancy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_08848 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Magnetic phase diagram of the three-dimensional doped Hubbard model Rampon, Liam Šimkovic IV, Fedor Ferrero, Michel Strongly Correlated Electrons We establish the phase diagram of the Hubbard model on a cubic lattice for a wide range of temperatures, dopings and interaction strengths, considering both commensurate and incommensurate magnetic orders. We use the dynamical mean-field theory together with an efficient method to compute the free energy which enable the determination of the correct ordering vectors. Besides an antiferromagnetic state close to half-filling, we identify a number of different magnetic spiral phases with ordering vectors $(q,π,π)$, $(q,q,π)$ and $(q,q,q)$ as well as a region with close competition between them, hinting at spatial phase separation or at the onset of a stripe phase. Additionally, we extensively study several thermodynamic properties with direct relevance to cold-atom experiments: the entropy, energy and double-occupancy. |
| title | Magnetic phase diagram of the three-dimensional doped Hubbard model |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2409.08848 |