An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Screening Energies in Photoelectron Spectroscopy of Localized Electron Levels
Published
Author(s)
John William Gadzuk
Abstract
Screening or polarization energies (often called "extra-atomic relaxation energies") associated with localized-hole creation in photoelectron spectroscopy in or on metals have been calculated. Following the procedure of Hedin and Lundqvist, the screening energy is written in terms of an effective matrix element of a nonlocal random-phase-approximation self-energy between wave functions of the localized-hole state. The relevance of spatial extent of the hole, electron-gas dielectric properties, chemical-bonding effects, and surface effects are examined. Calculations for 1 s core and bonding H2 orbital holes in atoms or molecules which are embedded in and adsorbed on electron-gas surfaces are presented. The interplay between orbital size and host interelectron spacing (as manifested in screening lengths) is emphasized. The relationship between screening energies and classical image potentials in photoelectron spectroscopy of adsorbed atoms and molecules is established. Finally, interpretations of observed photoelectron spectra are discussed in terms of binding energies and relaxation, chemical, and "dipole" potential shifts, and the problem of "proper" referencing is addressed.
Citation
Physical Review B (Condensed Matter and Materials Physics)
, J.
(1976),
Screening Energies in Photoelectron Spectroscopy of Localized Electron Levels, Physical Review B (Condensed Matter and Materials Physics)
(Accessed December 5, 2024)