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

TL;DR

This study demonstrates that the 2D t-J model with J/t=0.4 captures key experimental features of high-temperature superconductors, including d-wave pairing and the suppression of antiferromagnetism with doping.

Contribution

The paper shows that the 2D t-J model reproduces the transition from antiferromagnetism to d-wave superconductivity observed in high-Tc cuprates.

Findings

Enhanced d-wave correlations at optimal doping

Suppression of antiferromagnetic order with doping

Evidence of off-diagonal long-range order at δ ~ 0.15

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 \delta ~ 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 \delta >~ 0.1.