2020/11/17 by Erik G. C. P. van Loon, Erik G C P van Loon · 6 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Dual (grammatical number) #Electron #Fermion #Heavy fermion #Hubbard model #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Strongly correlated material #cond-mat.str-el
paper · pdf · doi:10.1088/1361-648x/abd9ed
published in Journal of Physics Condensed Matter 33(13), 135601 (IOP Publishing) · Example scripts are included in the arxiv source
arxiv created 2020/11/17 · openalex created_date 2020/11/23 · openalex publication_date 2021/01/10 · arxiv updated 2021/01/27 · openalex updated_date 2026/08/05
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.