Strange metal and superconductor in the two-dimensional Yukawa-Sachdev-Ye-Kitaev model
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866929592204263424 |
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| author | Li, Chenyuan Valentinis, Davide Patel, Aavishkar A. Guo, Haoyu Schmalian, Jörg Sachdev, Subir Esterlis, Ilya |
| author_facet | Li, Chenyuan Valentinis, Davide Patel, Aavishkar A. Guo, Haoyu Schmalian, Jörg Sachdev, Subir Esterlis, Ilya |
| contents | The two-dimensional Yukawa-Sachdev-Ye-Kitaev (2d-YSYK) model provides a universal theory of quantum phase transitions in metals in the presence of quenched random spatial fluctuations in the local position of the quantum critical point. It has a Fermi surface coupled to a scalar field by spatially random Yukawa interactions. We present full numerical solutions of a self-consistent disorder averaged analysis of the 2d-YSYK model in both the normal and superconducting states, obtaining electronic spectral functions, frequency-dependent conductivity, and superfluid stiffness. Our results reproduce key aspects of observations in the cuprates as analyzed by Michon et al. (arXiv:2205.04030). We also find a regime of increasing zero temperature superfluid stiffness with decreasing superconducting critical temperature, as is observed in bulk cuprates. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_07608 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Strange metal and superconductor in the two-dimensional Yukawa-Sachdev-Ye-Kitaev model Li, Chenyuan Valentinis, Davide Patel, Aavishkar A. Guo, Haoyu Schmalian, Jörg Sachdev, Subir Esterlis, Ilya Strongly Correlated Electrons Superconductivity High Energy Physics - Theory The two-dimensional Yukawa-Sachdev-Ye-Kitaev (2d-YSYK) model provides a universal theory of quantum phase transitions in metals in the presence of quenched random spatial fluctuations in the local position of the quantum critical point. It has a Fermi surface coupled to a scalar field by spatially random Yukawa interactions. We present full numerical solutions of a self-consistent disorder averaged analysis of the 2d-YSYK model in both the normal and superconducting states, obtaining electronic spectral functions, frequency-dependent conductivity, and superfluid stiffness. Our results reproduce key aspects of observations in the cuprates as analyzed by Michon et al. (arXiv:2205.04030). We also find a regime of increasing zero temperature superfluid stiffness with decreasing superconducting critical temperature, as is observed in bulk cuprates. |
| title | Strange metal and superconductor in the two-dimensional Yukawa-Sachdev-Ye-Kitaev model |
| topic | Strongly Correlated Electrons Superconductivity High Energy Physics - Theory |
| url | https://arxiv.org/abs/2406.07608 |