Universal High Energy Anomaly In The Angle-Resolved Photoemission Spectra Of High Temperature Superconductors: Possible Evidence Of Spinon And Holon Branches

A universal high energy anomaly in the single particle spectral function is reported in three different families of high temperature superconductors by using angle-resolved photoemission spectroscopy. As we follow the dispersing peak of the spectral function from the Fermi energy to the valence band complex, we find dispersion anomalies m...更多