Superconducting valence bond fluid in lightly doped 8-leg t - J cylinders
The study used Density Matrix Renormalization Group (DMRG) to examine lightly doped t-J models on 8-leg cylinders up to width 8. It found that ground states are nearly identical for 'doped quantum spin liquid' and 'doped valence bond crystal.' Increasing the cylinder width strengthens superconducting correlations while suppressing competing charge-density-wave order, suggesting a nodeless d-wave superconductor in the 2D limit.