Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/101661
Title: Consistent partial bosonization of the extended Hubbard model
Authors: Stepanov, E. A.
Harkov, V.
Lichtenstein, A. I.
Issue Date: 2019
Publisher: American Physical Society
Citation: Stepanov E. A. Consistent partial bosonization of the extended Hubbard model / E. A. Stepanov, V. Harkov, A. I. Lichtenstein. — DOI 10.1103/PhysRevB.100.205115 // Physical Review B. — 2019. — Vol. 100. — Iss. 20. — 205115.
Abstract: We design an efficient and balanced approach that captures major effects of collective electronic fluctuations in strongly correlated fermionic systems using a simple diagrammatic expansion on a basis of dynamical mean-field theory. For this aim we perform a partial bosonization of collective fermionic fluctuations in leading channels of instability. We show that a simultaneous account for different bosonic channels can be done in a consistent way that allows to avoid the famous Fierz ambiguity problem. The present method significantly improves a description of an effective screened interaction W in both charge and spin channels, and has a great potential for application to realistic GW-like calculations for magnetic materials. © 2019 American Physical Society.
Keywords: MAGNETIC MATERIALS
BOSONIC CHANNELS
BOSONIZATION
DYNAMICAL MEAN-FIELD THEORY
EXTENDED HUBBARD MODEL
FERMIONIC SYSTEMS
SPIN CHANNELS
MEAN FIELD THEORY
URI: http://hdl.handle.net/10995/101661
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85075295881
PURE ID: 11347926
edc4a4ec-4c98-4e48-b255-fbadd51b01f1
ISSN: 24699950
DOI: 10.1103/PhysRevB.100.205115
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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