Abstract
Photoemission studies show the presence of a high-energy anomaly in the observed band dispersion for two families of cuprate superconductors, and . The anomaly, which occurs at a binding energy of approximately 340 meV, is found to be anisotropic and relatively weakly doping dependent. Scattering from short range or nearest neighbor spin excitations is found to supply an adequate description of the observed phenomena.
- Received 17 October 2006
DOI:https://doi.org/10.1103/PhysRevLett.98.167003
©2007 American Physical Society