Abstract
The self-energy of the photohole in is measured by angle-resolved photoemission spectroscopy as a function of binding energy and temperature. In the charge-density wave (CDW) state, a structure in the self-energy is detected at that cannot be explained by electron-phonon scattering. A reduction in the scattering rates below this energy indicates the collapse of a major scattering channel with the formation of the CDW state accompanying the appearance of a bosonic “mode” in the excitation spectrum of the system.
- Received 30 May 2000
DOI:https://doi.org/10.1103/PhysRevLett.85.4759
©2000 American Physical Society