1. Strange metal and superconductor in the two-dimensional Yukawa-Sachdev-Ye-Kitaev model
- Author
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Li, Chenyuan, Valentinis, Davide, Patel, Aavishkar A., Guo, Haoyu, Schmalian, Jörg, Sachdev, Subir, and Esterlis, Ilya
- Subjects
Condensed Matter - Strongly Correlated Electrons ,Condensed Matter - Superconductivity ,High Energy Physics - Theory - Abstract
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., Comment: 7+18 pages, 5+12 figures; references added
- Published
- 2024