By performing high resolution angle resolved photoemission spectroscopy (ARPES) experiments on four different families of p-type cuprates, over an energy range much bigger than investigated before, we report the discovery of a universal high energy anomaly in the spectral function. This anomaly is characterized by the presence of two new high energy scales E1=0.35−0.45eV and E2=0.8−0.9eV and the pinning of the main ARPES spectral function along the boundary of a diamond in the momentum space. This anomaly unveils a missing link between the doped oxygen holes and the quasiparticles, providing a full range of relevant interaction to the high Tc problem.
@article{arxiv.cond-mat/0610313,
title = {Universal waterfalls-like feature in the spectral function of high temperature superconductors},
author = {J. Graf and G. -H. Gweon and A. Lanzara},
journal= {arXiv preprint arXiv:cond-mat/0610313},
year = {2007}
}
Comments
to be published in the proceeding of the M2S-HTS - July 2006