DYNAMICAL PROPERTIES OF THE SINGLE-HOLE T-J MODEL ON A 32-SITE SQUARELATTICE

We present results of an exact diagonalization calculation of the spec tral function A(k,omega) for a single hole described by the t-J model propagating on a 32-site square cluster. The minimum energy state is f ound at a crystal momentum k=(pi/2,pi/2), consistent with theory, and our measured dispersion relation agrees well with that determined usin g the self-consistent Born approximation. In contrast to smaller clust er studies, our spectra show no evidence of string resonances. We also make a qualitative comparison of the variation of the spectral weight in various regions of the first Brillouin zone with recent angle-reso lved-photoemission data.