  Within the framework of the fermion-spin theory based on the charge-spin
separation, the charge dynamics of the doped antiferromagnet on a triangular
lattice is studied. The holon part is treated by using the loop expansion to
the second order. It is shown that the charge dynamics is mainly caused by
charged holons moving in the background of spinon excitations. The optical
conductivity spectrum shows an unusual behavior at low energies and an
anomalous midinfrared band, while the resistivity exhibits a nonlinearity in
temperatures.
