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From antiferromagnetism to d-wave superconductivity in the 2D t-J model

Matteo Calandra·Sandro Sorella
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Abstract

We have found that the two dimensional t-J model, for the physical parameter range J/t = 0.4 reproduces the main experimental qualitative features of High-Tc copper oxide superconductors: d-wave superconducting correlations are strongly enhanced upon small doping and clear evidence of off diagonal long range order is found at the optimal doping δ~ 0.15. On the other hand antiferromagnetic long range order, clearly present at zero hole doping, is suppressed at small hole density with clear absence of antiferromagnetism at δ>~ 0.1.

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Matteo Calandra, Sandro Sorella. 1999-11-30. From antiferromagnetism to d-wave superconductivity in the 2D t-J model. https://doi.org/10.1103/physrevb.61.r11894

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