Electron-phonon coupling in correlated materials: insights from the Hubbard-Holstein model
Fuente:
arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866916734918721536 |
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| author | Coulter, Jennifer Millis, Andrew J. |
| author_facet | Coulter, Jennifer Millis, Andrew J. |
| contents | Dynamical mean-field theory computations of the electron self energy of the Hubbard-Holstein model as a function of electron-phonon and electron-electron interactions are analyzed to gain insight into the dependence of electron-phonon couplings on correlation strength in quantum materials. We find that the electron-phonon interaction is strongly suppressed by electronic correlations, while electron-electron correlation effects at Fermi liquid scales are only weakly modified by coupling to phonons, with phonon-induced modifications most evident at high frequencies on the order of the electronic bandwidth. Implications for beyond-density functional theories of the electron-phonon interaction are discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_08081 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Electron-phonon coupling in correlated materials: insights from the Hubbard-Holstein model Coulter, Jennifer Millis, Andrew J. Strongly Correlated Electrons Dynamical mean-field theory computations of the electron self energy of the Hubbard-Holstein model as a function of electron-phonon and electron-electron interactions are analyzed to gain insight into the dependence of electron-phonon couplings on correlation strength in quantum materials. We find that the electron-phonon interaction is strongly suppressed by electronic correlations, while electron-electron correlation effects at Fermi liquid scales are only weakly modified by coupling to phonons, with phonon-induced modifications most evident at high frequencies on the order of the electronic bandwidth. Implications for beyond-density functional theories of the electron-phonon interaction are discussed. |
| title | Electron-phonon coupling in correlated materials: insights from the Hubbard-Holstein model |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2505.08081 |