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arXiv · 2607.04168

Cuprate d-wave superconductivity based on Non perturbative many body theory for spin fluctuation

Jianwei Gong·Junnian Xiong·Ruitao Xiao·Hui Li·Ziyu Li·Huaqing Huang·Dingping Li
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Abstract

We employ the nonperturbative many-body spin GW method to compute the single-particle Green's function, and the covariance method to evaluate the two-body correlation functions, for the Hubbard model of superconductors. The method, benchmarked at strong coupling and low temperatures, allows simulations on lattices up to $64\times64$, thereby enabling access to the thermodynamic limit. We find the key transition temperatures---namely the N\'eel temperature and the superconducting critical temperature $T_c$---to be in quantitative agreement with experimental data. Above the $d$-wave superconducting dome, there exists a broad pseudogap region in which the normal-state excitations are suppressed. These results indicate our approach may offer a new route toward investigating strongly correlated systems, especially cuprate superconductors.

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Jianwei Gong, Junnian Xiong, Ruitao Xiao, Hui Li, Ziyu Li, Huaqing Huang, Dingping Li. 2026-07-05. Cuprate d-wave superconductivity based on Non perturbative many body theory for spin fluctuation. https://arxiv.org/abs/2607.04168

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