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Using numerical techniques, the diagonal and off-diagonal superconductingone-electron Green's functions are calculated for a two-dimensional (2D) t-Jmodel on a periodic 32-site cluster at low doping. From these Green'sfunctions, the momentum and frequency dependence of the pairing gap $\Delta({\bf k}, \omega)$ are extracted. It has $d_{x^2-y^2}$ symmetry and exhibits$\omega$-dependent structure which depend upon J/t. We find that the pairinggap persists down to small J/t values. The frequency- and momentum-dependentrenormalized energy and renormalization factor are also calculated.Comment: 4 pages, 4 figures, 1 table, submitted to PR

physical review. b, condensed matter

Calculation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Δ</mml:mi><mml:mo>(</mml:mo><mml:mi mathvariant="normal">k</mml:mi><mml:mo>,</mml:mo><mml:mi>ω</mml:mi><mml:mo>)</mml:mo></mml:math>for a two-dimensional<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>t</mml:mi><mml:mo>−</mml:mo><mml:mi>J</mml:mi></mml:math>cluster

Calculation ofΔ(k,ω)for a two-dimensionalt−Jcluster