G-ON MEAN-FIELD THEORY OF THE T-J MODEL - UNIFORM RVB STATE

A new possible treatment of the gauge field fluctuations around the sl ave-boson mean-field theory for the t-J model has been proposed by att aching gauge flux to spinons and holons and then treating them as g-on 's, which respect time reversal symmetry and continuously interpolate between fermions and bosons. Using the thermodynamic distribution func tion of g-on's and assigning statistics to holons (g) and spinons (1-g ), the optimum statistics has been determined in the plane of doping r ate and temperature. The results indicate that slave fermion (slave bo son) is favored at low (high) doping with intermediate statistics in b etween. The consequences of varying the dimensionality and strength of J have been studied also.