We investigate the consequences of an incommensurate magnetic order in doped La_2-xSr_xCuO₄ using dynamical mean-field theory for the effective single-band model. The high-energy optical transitions are due to high-energy excitations across a large Mott-Hubbard "gap," while low-energy excitations involve a pseudogap induced by the local spin order. The latter lead to a strong drop in the scattering rate at low omega , in qualitative agreement with the experimental data.
 

Journal of Superconductivity, 12 147-9, 1999.