Is the dispersion anomaly of the electron spectrum induced by the charge-density-wave in high-Tc superconductors?
T. Zhou, Z. D. Wang
Abstract
We propose that the presence of a rotationally symmetric charge density wave (CDW) with the modulation of 4-lattice constant in high-Tc superconductors is essentially responsible for an anomalous quasiparticle dispersion revealed recently by angle-resolved photoemission spectroscopy (ARPES) experiments. We elaborate clearly that the nodal quasiparticle is well-defined at low energies, while the dispersion breaks up at the energy E1 and reappears at the energy E2. Our results are in good agreement with both the ARPES and scanning tunneling microscopy experiments.
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