Flat bands and unconventional superconductivity in a simple model of metal-organic frameworks
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| Main Authors: | , , , |
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| Format: | Preprint |
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2022
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| _version_ | 1866929635548200960 |
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| author | Ohlrich, M. F. Makaresz, E. M. Nourse, H. L. Powell, B. J. |
| author_facet | Ohlrich, M. F. Makaresz, E. M. Nourse, H. L. Powell, B. J. |
| contents | The superconducting metal-organic framework Cu-BHT forms a kagome lattice with metals at the vertices and ligands along the bonds. This bipartite motif is common in reticular materials. We show that a tight-binding model on this lattice yields partially occupied interference-induced flat bands at half-filling with large gaps between them and all other bands. Long-range hopping induces curvature in the bands but leaves them flatter and more isolated than those in twisted bilayer graphene. The slave boson theory of the t-J model on this lattice shows highly unconventional superconductivity including an f -wave singlet phase. Thus, framework materials provide an ideal lattice-driven approach to strongly correlated phenomena in flat bands at high electronic densities. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2209_10673 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Flat bands and unconventional superconductivity in a simple model of metal-organic frameworks Ohlrich, M. F. Makaresz, E. M. Nourse, H. L. Powell, B. J. Superconductivity Strongly Correlated Electrons Chemical Physics The superconducting metal-organic framework Cu-BHT forms a kagome lattice with metals at the vertices and ligands along the bonds. This bipartite motif is common in reticular materials. We show that a tight-binding model on this lattice yields partially occupied interference-induced flat bands at half-filling with large gaps between them and all other bands. Long-range hopping induces curvature in the bands but leaves them flatter and more isolated than those in twisted bilayer graphene. The slave boson theory of the t-J model on this lattice shows highly unconventional superconductivity including an f -wave singlet phase. Thus, framework materials provide an ideal lattice-driven approach to strongly correlated phenomena in flat bands at high electronic densities. |
| title | Flat bands and unconventional superconductivity in a simple model of metal-organic frameworks |
| topic | Superconductivity Strongly Correlated Electrons Chemical Physics |
| url | https://arxiv.org/abs/2209.10673 |