Photoemission spectroscopy from inhomogeneous models of cuprates - art. no. 174510

We investigate the electronic dynamics in the underdoped cuprates. focusing on the effects of one-dimensional charge stripes. We address recent experi mental angle-resolved photoemission spectra for (La1.28Nd0.6Sr0.12)CuO4. We find that various inhomogeneous models can account for the distribution of quasiparticle weights close to momentum k=(pi ,0) and symmetry-related poi nts. The observed flat dispersion region around the same k point can be add ressed by certain classes of those inhomogeneous models which locally break spin symmetry. Homogeneous models, including hopping elements up to second neighbors, cannot reproduce the experimental quasiparticle weight, since m ost of it is centered around k=(pi /2,pi /2).