Multiorbital simplified parquet equations for strongly correlated electrons

0361328 - FZÚ 2012 RIV US eng J - Journal Article
Augustinský, Pavel - Janiš, Václav
Multiorbital simplified parquet equations for strongly correlated electrons.
Physical Review. B. Roč. 83, č. 3 (2011), "035114-1"-"035114-13". ISSN 1098-0121
R&D Projects: GA ČR(CZ) GC202/07/J047
Institutional research plan: CEZ:AV0Z10100520
Keywords : multi-orbital model * strongly correlated electrons * parquet equations * Kondo regime
Subject RIV: BE - Theoretical Physics
Impact factor: 3.691, year: 2011
http://prb.aps.org/abstract/PRB/v83/i3/e035114

We extend an approximation that we developed earlier for the single-impurity Anderson model to a full-size impurity solver for models of interacting electrons with multiple orbitals. The approximation is based on parquet equations simplified by separating small and large energy fluctuations justified in the critical region of a pole in the two-particle vertex. We explicitly calculate properties of a paramagnetic solution of a two-orbital Hubbard model with a Hund exchange and orbital splitting within the dynamical mean-field approximation.
Permanent Link: http://hdl.handle.net/11104/0198666