Symmetries of electron interactions in Hubbard models of unconventional superconductors
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908431596650496 |
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| author | Urazhdin, Sergei Zhang, Yiou |
| author_facet | Urazhdin, Sergei Zhang, Yiou |
| contents | We use symmetry arguments to show that the matrix elements of electron-electron interaction on a lattice reach extrema in states composed of wavevectors near high-symmetry points of the Brillouin zone. The mechanism is illustrated by minimal models of cuprates and Fe-based superconductors, where this dependence originates from the wavevector-dependent orbital composition of wavefunctions. We discuss how these dependences can facilitate finite-momentum pairing. Our results provide symmetry-based guidance for the search for new high-temperature superconductors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_02296 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Symmetries of electron interactions in Hubbard models of unconventional superconductors Urazhdin, Sergei Zhang, Yiou Superconductivity Materials Science Strongly Correlated Electrons We use symmetry arguments to show that the matrix elements of electron-electron interaction on a lattice reach extrema in states composed of wavevectors near high-symmetry points of the Brillouin zone. The mechanism is illustrated by minimal models of cuprates and Fe-based superconductors, where this dependence originates from the wavevector-dependent orbital composition of wavefunctions. We discuss how these dependences can facilitate finite-momentum pairing. Our results provide symmetry-based guidance for the search for new high-temperature superconductors. |
| title | Symmetries of electron interactions in Hubbard models of unconventional superconductors |
| topic | Superconductivity Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2507.02296 |