Electron pairing in model with two overlapping bands
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arXiv
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866912805141086208 |
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| author | Karnaukhov, Igor N. |
| author_facet | Karnaukhov, Igor N. |
| contents | We consider the two-band Hubbard model, where electrons from different bands interact through an on-site one- and two-particle hybridization. The proposed Hamiltonian makes it possible to construct an effective theory and answer the question of the nature of pairing: conduction electrons form pairs due to two-particle hybridization of electrons from different bands, compensating for the direct Hubbard repulsion between conduction electrons. It is shown that an effective attraction between conduction electrons leads to $η$-pairing. The electron-electron pairing mechanism explains the presence of superconductivity at high temperatures experimentally observed in hydrogen-rich materials at high pressure. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_02973 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Electron pairing in model with two overlapping bands Karnaukhov, Igor N. Strongly Correlated Electrons We consider the two-band Hubbard model, where electrons from different bands interact through an on-site one- and two-particle hybridization. The proposed Hamiltonian makes it possible to construct an effective theory and answer the question of the nature of pairing: conduction electrons form pairs due to two-particle hybridization of electrons from different bands, compensating for the direct Hubbard repulsion between conduction electrons. It is shown that an effective attraction between conduction electrons leads to $η$-pairing. The electron-electron pairing mechanism explains the presence of superconductivity at high temperatures experimentally observed in hydrogen-rich materials at high pressure. |
| title | Electron pairing in model with two overlapping bands |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2601.02973 |