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| Hauptverfasser: | , , |
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| Format: | Preprint |
| Veröffentlicht: |
2023
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| Online-Zugang: | https://arxiv.org/abs/2311.15092 |
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| _version_ | 1866912296802975744 |
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| author | Chen, Feng Haldane, F. D. M. Sheng, D. N. |
| author_facet | Chen, Feng Haldane, F. D. M. Sheng, D. N. |
| contents | The Hubbard and closely related $t\text-J$ models are exciting platforms for unconventional superconductivity (SC). Through state-of-the-art density matrix renormalization group calculations using the grand canonical ensemble, we address open issues regarding the ground-state phase diagram of the extended $t\text{-}J$ model on a square lattice in the parameter regime relevant to cuprate superconductors. On large 8-leg cylinders, we demonstrate that the pure $t\text{-}J$ model with only nearest-neighbor hoppings and superexchange interactions, for a wide range of doping ($δ=0.1-0.2$), hosts robust d-wave superconductivity possibly coexisting with weak unidirectional pair density wave. Furthermore, a small next nearest neighbor hopping $t_2$ suppresses pair and charge density waves, resulting in a uniform d-wave SC phase in both electron- and hole-doped cuprate model systems. Our work validates the $t\text-J$ model as a proper minimum model for the emergence of superconductivity in cuprate superconductors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_15092 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Global Phase Diagram of D-wave Superconductivity in the Square-Lattice $t\text{-}J$ Model Chen, Feng Haldane, F. D. M. Sheng, D. N. Superconductivity The Hubbard and closely related $t\text-J$ models are exciting platforms for unconventional superconductivity (SC). Through state-of-the-art density matrix renormalization group calculations using the grand canonical ensemble, we address open issues regarding the ground-state phase diagram of the extended $t\text{-}J$ model on a square lattice in the parameter regime relevant to cuprate superconductors. On large 8-leg cylinders, we demonstrate that the pure $t\text{-}J$ model with only nearest-neighbor hoppings and superexchange interactions, for a wide range of doping ($δ=0.1-0.2$), hosts robust d-wave superconductivity possibly coexisting with weak unidirectional pair density wave. Furthermore, a small next nearest neighbor hopping $t_2$ suppresses pair and charge density waves, resulting in a uniform d-wave SC phase in both electron- and hole-doped cuprate model systems. Our work validates the $t\text-J$ model as a proper minimum model for the emergence of superconductivity in cuprate superconductors. |
| title | Global Phase Diagram of D-wave Superconductivity in the Square-Lattice $t\text{-}J$ Model |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2311.15092 |