Moment functional based spectral density functional theory
Freimuth F, Bluegel S, Mokrousov Y (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Book Volume: 106
Article Number: 155114
Journal Issue: 15
DOI: 10.1103/PhysRevB.106.155114
Abstract
We describe a density functional method which aims at computing the ground state electron density and the spectral function at the same time. One basic ingredient of our method is the construction of the spectral function from the first four spectral moment matrices. The second basic ingredient is the construction of the spectral moment matrices from density functionals. We call our method moment functional based spectral density functional theory (MFbSDFT), because it is based on density functionals for the spectral moments and because it allows us to compute the spectral function. If it is implemented in second variation our method consumes only a fraction more computer time than a standard DFT calculation with the PBE functional. We show that MFbSDFT captures correlation effects such as the valence-band satellite in Ni and the formation of lower and upper Hubbard bands in SrVO3. For the purpose of constructing the spectral function from the first four N×N spectral moment matrices we describe an efficient algorithm based on the diagonalization of one Hermitian 2N×2N matrix.
Involved external institutions
Germany (DE)How to cite
APA:
Freimuth, F., Bluegel, S., & Mokrousov, Y. (2022). Moment functional based spectral density functional theory. Physical Review B, 106(15). https://doi.org/10.1103/PhysRevB.106.155114
MLA:
Freimuth, Frank, Stefan Bluegel, and Yuriy Mokrousov. "Moment functional based spectral density functional theory." Physical Review B 106.15 (2022).
BibTeX: Download