Beyond-Hubbard pairing in a cuprate ladder
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866916730917355520 |
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| author | Padma, Hari Thomas, Jinu TenHuisen, Sophia He, Wei Guan, Ziqiang Li, Jiemin Lee, Byungjune Wang, Yu Lee, Seng Huat Mao, Zhiqiang Jang, Hoyoung Bisogni, Valentina Pelliciari, Jonathan Dean, Mark P. M. Johnston, Steven Mitrano, Matteo |
| author_facet | Padma, Hari Thomas, Jinu TenHuisen, Sophia He, Wei Guan, Ziqiang Li, Jiemin Lee, Byungjune Wang, Yu Lee, Seng Huat Mao, Zhiqiang Jang, Hoyoung Bisogni, Valentina Pelliciari, Jonathan Dean, Mark P. M. Johnston, Steven Mitrano, Matteo |
| contents | The Hubbard model is believed to capture the essential physics of cuprate superconductors. However, recent theoretical studies suggest that it fails to reproduce a robust and homogeneous superconducting ground state. Here, using resonant inelastic x-ray scattering and density matrix renormalization group calculations, we show that magnetic excitations in the prototypical cuprate ladder Sr$_{14}$Cu$_{24}$O$_{41}$ are inconsistent with those of a simple Hubbard model. The magnetic response of hole carriers, contributing to an emergent branch of spin excitations, is strongly suppressed. This effect is the consequence of d-wave-like pairing, enhanced by nearly an order of magnitude through a large nearest-neighbor attractive interaction. The similarity between cuprate ladders and the two-dimensional compounds suggests that such an enhanced hole pairing may be a universal feature of superconducting cuprates. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_10287 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Beyond-Hubbard pairing in a cuprate ladder Padma, Hari Thomas, Jinu TenHuisen, Sophia He, Wei Guan, Ziqiang Li, Jiemin Lee, Byungjune Wang, Yu Lee, Seng Huat Mao, Zhiqiang Jang, Hoyoung Bisogni, Valentina Pelliciari, Jonathan Dean, Mark P. M. Johnston, Steven Mitrano, Matteo Strongly Correlated Electrons Materials Science Superconductivity The Hubbard model is believed to capture the essential physics of cuprate superconductors. However, recent theoretical studies suggest that it fails to reproduce a robust and homogeneous superconducting ground state. Here, using resonant inelastic x-ray scattering and density matrix renormalization group calculations, we show that magnetic excitations in the prototypical cuprate ladder Sr$_{14}$Cu$_{24}$O$_{41}$ are inconsistent with those of a simple Hubbard model. The magnetic response of hole carriers, contributing to an emergent branch of spin excitations, is strongly suppressed. This effect is the consequence of d-wave-like pairing, enhanced by nearly an order of magnitude through a large nearest-neighbor attractive interaction. The similarity between cuprate ladders and the two-dimensional compounds suggests that such an enhanced hole pairing may be a universal feature of superconducting cuprates. |
| title | Beyond-Hubbard pairing in a cuprate ladder |
| topic | Strongly Correlated Electrons Materials Science Superconductivity |
| url | https://arxiv.org/abs/2501.10287 |