Abstract
The experimentally predicted narrowing in the bandwidth of sodium is interpreted in terms of the nonlocal self-energy effect on quasiparticle energies of the electron liquid. The calculated self-energy correction is an increasing function of the wave number variable. The usual analysis of angle-resolved photoemission experiments assumes the final-state energies on the nearly free-electron-like model and hence incorrectly ascribes the nonlocal self-energy correction to the final-state energies to occupied-state energies, seemingly leading to a narrowing in the bandwidth.
- Received 13 May 1999
DOI:https://doi.org/10.1103/PhysRevLett.83.3250
©1999 American Physical Society