, E.
(2021),
A new model dielectric function for loss functions and electron damping, Radiation Physics and Chemistry, [online], https://doi.org/10.1016/j.radphyschem.2019.02.024, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=927161
(Accessed October 1, 2025)
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.
A new model dielectric function for loss functions and electron damping
Published
Author(s)
Abstract
Trends in the zeroth frequency moment of the imaginary part of the dielectric function are studied for a wide range of metals, semiconductors and insulators. These results are combined with estimates for the inverse-first moment (related by Kramers-Kronig relations to the static dielectric function) and knowledge of the first moment from the f-sum rule. Matching all three moments allows for construction of a model dielectric function that reasonably predicts the loss function at different values of momentum and lifetime damping effects on occupied and unoccupied electron states. This is demonstrated by comparing model results and results of detailed, first- principles calculations.Citation
Radiation Physics and Chemistry
Volume
167
Pub Type
Journals
Download Paper
Keywords
dielectric function, lifetime damping, loss function, self-energy, sum rule
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact [email protected].
Created March 10, 2021, Updated April 6, 2021