Cooperative behavior of RVB, flux phase, and antiferromagnetic states

Abstract

The coexistence of RVB, flux phase, and antiferromagnetic states for the t-J model is studied within the frame work of the mean-field theory by means of the slave-boson approach. Two simple relations among these three order parameters manifesting the cooperative behavior of these states are derived. A phase diagram separating the antiferromagnetic from the non-antiferromagnetic stale is obtained. Comparison with available previous work shows that our result agrees reasonably well. (C) 1997 Elsevier Science B.V.