Coexistence of superconductivity and charge density wave in a correlated regime
Fuente:
arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866915761070538752 |
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| author | Calegari, E. J. Prauchner, L. C. Lausmann, A. C. Magalhaes, S. G. |
| author_facet | Calegari, E. J. Prauchner, L. C. Lausmann, A. C. Magalhaes, S. G. |
| contents | To investigate the coexistence of superconductivity and charge density wave (CDW) in a correlated regime, we employ the Green's functions formalism, as well as the Hubbard-I approximation, as a way to introduce the correlations into the problem, in the form of a repulsive Coulomb interaction $U$. In addition, we investigate the effects of second-nearest neighbor hopping $t_1$ on a pure CDW state. The analysis of the results show that, for small values of $t_1$, both CDW and superconducting gaps compete for the same region on the Fermi surface. The increase of $t_1$ decreases the competition and may lead the system to a coexistence regime. Effects of temperature in the coexistence regime, are also investigated. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_06326 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Coexistence of superconductivity and charge density wave in a correlated regime Calegari, E. J. Prauchner, L. C. Lausmann, A. C. Magalhaes, S. G. Superconductivity Strongly Correlated Electrons To investigate the coexistence of superconductivity and charge density wave (CDW) in a correlated regime, we employ the Green's functions formalism, as well as the Hubbard-I approximation, as a way to introduce the correlations into the problem, in the form of a repulsive Coulomb interaction $U$. In addition, we investigate the effects of second-nearest neighbor hopping $t_1$ on a pure CDW state. The analysis of the results show that, for small values of $t_1$, both CDW and superconducting gaps compete for the same region on the Fermi surface. The increase of $t_1$ decreases the competition and may lead the system to a coexistence regime. Effects of temperature in the coexistence regime, are also investigated. |
| title | Coexistence of superconductivity and charge density wave in a correlated regime |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2601.06326 |