%0 Journal Article
%T Indications of d_{x^2 - y^2} Superconductivity in the Two Dimensional t-J Model
%A Elbio Dagotto
%A Jose Riera
%J Physics
%D 1992
%I arXiv
%R 10.1103/PhysRevLett.70.682
%X Superconducting correlations in the two dimensional ${\rm t-J}$ model at zero temperature are evaluated using numerical techniques. At the fermionic density $\langle n \rangle \sim 1/2$, strong signals of $\dx2y2$ superconductivity were observed in the ground state. These conclusions are based on a study of static pairing correlations, the Meissner effect, flux quantization, and other indicators of superconductivity. It is argued that these results can be explained using a spin dimer ``liquid'' state. A phase diagram of the two dimensional ${\rm t-J}$ model is presented.
%U http://arxiv.org/abs/cond-mat/9212008v1