High-energy dispersion anomaly induced by the charge modulation in high-Tc superconductors

We propose that the presence of a rotationally symmetric charge modulation in high-T-c superconductors is able to account for an anomalous quasiparticle dispersion revealed recently by angle-resolved photoemission spectroscopy (ARPES) experiments. We elaborate that the nodal quasiparticle is well defined at low energies, while the dispersion breaks up at the energy E-1 and reappears at the energy E-2. Our results are in agreement with both the ARPES and scanning tunneling microscopy experiments.