NORMAL FERMI-LIQUID BEHAVIOR OF QUASI-HOLES IN THE SPIN-POLARON MODELFOR COPPER OXIDES

Based on the t-J model and the self-consistent Born approximation, the damping of quasiparticle hole states near the Fermi surface is calcul ated in a low-doping regime. Renormalization of spin-wave excitations due to hole doping is taken into account. The damping is shown to be d escribed by a familiar form Im Sigma(k', epsilon) proportional to (eps ilon(2)/epsilon(F))ln(epsilon/epsilon(F)) characteristic of the two-di mensional Fermi liquid, in contrast with the earlier statement reporte d by Li and Gong [Phys. Rev. B 51, 6343 (1995)] on the marginal Fermi- liquid behavior of quasiholes.