Electronic properties of a doped antiferromagnet on a<b><i>kagomé</i></b>lattice
Electronic properties of a doped antiferromagnet on a<b><i>kagomé</i></b>lattice
Within the t-$J$ model, we study the electronic properties of a doped antiferromagnet on a kagom\'e lattice based on the framework of the self-consistent mean-field theory. At the half-filling, the spin-liquid ground-state energy per site of the kagom\'e antiferromagnet is ${E}_{g}{/N}_{s}J=\ensuremath{-}0.859,$ which is in very good agreement with the numerical …