d-Wave Pairing Correlation in the Two-Dimensional t-J Model
C.T. Shih, Y.C. Chen, H.Q. Lin, and T.K. Lee
TL;DR
This study investigates the pair-pair correlation function in the 2D t-J model, concluding it lacks long-range d-wave superconducting order for J/t ≤ 0.5, challenging some expectations about high-temperature superconductivity.
Contribution
The paper provides the first detailed analysis of the pair correlations in the 2D t-J model using the power-Lanczos method, showing the absence of long-range d-wave pairing in relevant parameters.
Findings
No long-range d-wave superconducting correlation for J/t ≤ 0.5
Comparison with ideal Fermi gas highlights the lack of pairing
Results suggest limitations for the t-J model in explaining high-Tc superconductivity
Abstract
The pair-pair correlation function of the two-dimensional t-J model is studied by using the power-Lanczos method and an assumption of monotonic behavior. In comparison with the results of the ideal Fermi gas, we conclude that the 2D t-J model does not have long range d-wave superconducting correlation in the interesting parameter range of . Implications of this result will also be discussed.
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