Competing $s$-wave pairing in overdoped $t$-$J$ model
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866916972223004672 |
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| author | Zheng, Wayne Cheng, Tao Yue, Zheng-Yuan Zhang, Fu-Chun Chen, Wei-Qiang Gu, Zheng-Cheng |
| author_facet | Zheng, Wayne Cheng, Tao Yue, Zheng-Yuan Zhang, Fu-Chun Chen, Wei-Qiang Gu, Zheng-Cheng |
| contents | The $d$-wave pairing symmetry has long been considered a defining feature of high-temperature superconductivity in cuprates. In this work, we reveal that $s$-wave pairing states exhibit variational energies comparable to the $d$-wave state in a square $t$-$J$ model, particularly at high doping levels ($δ\gtrsim 15\%$) by using the state-of-the-art tensor network simulation. This surprising result suggests that $s$-wave pairing may play an important role in the cuprate phase diagram, especially for the overdoped region. Our findings provide a potential resolution to discrepancies in recent Josephson tunneling experiments on twisted bilayer cuprates and offer new insights into the evolution of pairing symmetry with doping. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_22473 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Competing $s$-wave pairing in overdoped $t$-$J$ model Zheng, Wayne Cheng, Tao Yue, Zheng-Yuan Zhang, Fu-Chun Chen, Wei-Qiang Gu, Zheng-Cheng Strongly Correlated Electrons Superconductivity The $d$-wave pairing symmetry has long been considered a defining feature of high-temperature superconductivity in cuprates. In this work, we reveal that $s$-wave pairing states exhibit variational energies comparable to the $d$-wave state in a square $t$-$J$ model, particularly at high doping levels ($δ\gtrsim 15\%$) by using the state-of-the-art tensor network simulation. This surprising result suggests that $s$-wave pairing may play an important role in the cuprate phase diagram, especially for the overdoped region. Our findings provide a potential resolution to discrepancies in recent Josephson tunneling experiments on twisted bilayer cuprates and offer new insights into the evolution of pairing symmetry with doping. |
| title | Competing $s$-wave pairing in overdoped $t$-$J$ model |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2509.22473 |