Sachdev-Ye-Kitaev superconductivity: Quantum Kuramoto and generalized Richardson models

The Sachdev-Ye-Kitaev (SYK) model has emerged as a new paradigm of non-Fermi-liquid behavior. Here we investigate a possibility of having a superconducting off-diagonal long-range order (ODLRO) and a pseudogap phase within the SYK framework. We found that ODLRO may be established in a spin-1/2 versi...

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Bibliographic Details
Published in:Physical review research 2020-07, Vol.2 (3), p.033025, Article 033025
Main Authors: Wang, Hanteng, Chudnovskiy, A. L., Gorsky, Alexander, Kamenev, Alex
Format: Article
Language:English
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Summary:The Sachdev-Ye-Kitaev (SYK) model has emerged as a new paradigm of non-Fermi-liquid behavior. Here we investigate a possibility of having a superconducting off-diagonal long-range order (ODLRO) and a pseudogap phase within the SYK framework. We found that ODLRO may be established in a spin-1/2 version of the model with the time-reversal invariance and an extra attractive interaction. If the latter is taken as the on-site negative U Hubbard term, it leads to the pseudogap phase at U
ISSN:2643-1564
2643-1564
DOI:10.1103/PhysRevResearch.2.033025