Multiorbital simplified parquet equations for strongly correlated electrons

0361328 - FZÚ 2012 RIV US eng J - Článek v odborném periodiku
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
Grant CEP: GA ČR(CZ) GC202/07/J047
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: multi-orbital model * strongly correlated electrons * parquet equations * Kondo regime
Kód oboru RIV: BE - Teoretická fyzika
Impakt faktor: 3.691, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0198666