Indications of dx2-y2 superconductivity in the two dimensional t-J model.

@article{Dagotto1993IndicationsOD,
title={Indications of dx2-y2 superconductivity in the two dimensional t-J model.},
author={Dagotto and Riera},
journal={Physical review letters},
year={1993},
volume={70 5},
pages={
682-685
}
}

Superconducting correlations in the two dimensional t-J model at zero temperature are evaluated using numerical techniques. At the fermionic density (n)∼1/2, strong signals of d x2-y2x superconductivity were observed in the ground state. These conclusions are based on a study of static pairing correlations, the Meissner effect, and flux quantization as indicators of superconductivity. A tentative phase diagram of the two dimensional t-J model is presented

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The equal-time pairing correlation function of the two-dimensional t – J model on a square lattice is studied using a high-temperature expansion method. The sum of the pairing correlation, its spat...