Pseudogap-induced change in the nature of the Lifshitz transition in the two-dimensional Hubbard model
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866914208750239744 |
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| author | Aguiar, Maria C. O. Bragança, Helena Paul, Indranil Civelli, Marcello |
| author_facet | Aguiar, Maria C. O. Bragança, Helena Paul, Indranil Civelli, Marcello |
| contents | We study the behavior of the density of states and the $B_{1g}$ nematic susceptibility extracted from Raman response data across the doping-driven Lifshitz transition comparing the weak and strong interaction cases. Our results were obtained using cluster dynamical mean field theory for the two-dimensional Hubbard model. In the weakly correlated Fermi liquid regime, both quantities are approximately symmetric around the Lifshitz transition doping $p_{LT}$. In the strongly correlated regime, the low-doping pseudogap leads to an asymmetric, discontinuous evolution when the Fermi surface changes from hole-like to electron-like at $p_{LT}$. The Lifshitz transition thus changes character because it is tied to the pseudogap-Fermi-liquid transition. These results are consistent with available observations and should foster further experimental investigations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_09783 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Pseudogap-induced change in the nature of the Lifshitz transition in the two-dimensional Hubbard model Aguiar, Maria C. O. Bragança, Helena Paul, Indranil Civelli, Marcello Strongly Correlated Electrons We study the behavior of the density of states and the $B_{1g}$ nematic susceptibility extracted from Raman response data across the doping-driven Lifshitz transition comparing the weak and strong interaction cases. Our results were obtained using cluster dynamical mean field theory for the two-dimensional Hubbard model. In the weakly correlated Fermi liquid regime, both quantities are approximately symmetric around the Lifshitz transition doping $p_{LT}$. In the strongly correlated regime, the low-doping pseudogap leads to an asymmetric, discontinuous evolution when the Fermi surface changes from hole-like to electron-like at $p_{LT}$. The Lifshitz transition thus changes character because it is tied to the pseudogap-Fermi-liquid transition. These results are consistent with available observations and should foster further experimental investigations. |
| title | Pseudogap-induced change in the nature of the Lifshitz transition in the two-dimensional Hubbard model |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2509.09783 |