Year: 2021
Type: article
Abstract: In dynamical mean-field theory, the correlations between electrons are assumed to be purely local. The dual fermion approach provides a systematic way of adding non-local corrections to the dynamical mean-field theory starting point. Initial applications of this method were largely restricted to the single-orbital Hubbard model. Here, we present an implementation of second-order dual fermion for general multi-orbital systems and use this approach to investigate spatial correlations in SrVO 3 . In addition, the approach is benchmarked in several exactly solvable small systems.
Author: Erik G C P van Loon
Institution: University of Bremen
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: Universität Bremen
OpenAlex ID: W3099769736