Multipole Representation of the Dielectric Matrix
Abstract
We introduce an iterative method for calculating an accurate multipole representation of the dielectric matrix. As an example application of this representation, we apply it in GW calculation. Results for the energy-dependent self-energies and other quasiparticle properties are presented for several materials. We also present preliminary results for GW self-energy calculations using a recently developed alternative model for the dielectric matrix. We apply these results to calculations of x-ray absorption and inelastic x-ray scattering spectra. Other possible uses for these representations of the dielectric matrix will be discussed.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2003
- Bibcode:
- 2003APS..MARV19008A