English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We propose new approach for treatment of local and non-local interactions incorrelated electronic systems, which uses self-energy and the two-particleirreducible vertices, obtained from (extended) dynamical mean-field theory, asan input of two-particle irreducible functional renormalization-group (2PI-fRG)approach. Using 2PI-fRG approach allows us to treat both, local and non-localinteractions. In case of purely local interaction the corresponding equationshave similar (although not identical) structure to the earlier developedDMF$^2$RG approach. In a simplest truncation, neglecting scale-dependence ofthe two-particle irreducible vertices, we reproduce the results for thetwo-particle vertices/susceptibilities in the ladder approximation of the dualboson or D$\Gamma$A approach; in more sophisticated truncations the methodallows us to consider non-local corrections to the self-energy, as well as theinterplay of charge- and spin correlations. treatment of vertexrenormalizations. The proposed scheme is tested on the two-dimensional standardand extended $U$-$V$ half-filled Hubbard models. For the standard Hubbard modelwe obtain non-local self-energy, which is in agreement with numerical studies;for the extended Hubbard model we obtain the boundary of charge instability,which agrees well with the results of the dual boson (DB) approach. We alsofind that the effect of spin correlations on electron interaction in the chargechannel, not considered previously in the DB approach, only slightly reducescritical next-nearest-neighbor interaction of charge instability of theextended Hubbard model at the considered finite small temperature, yieldingbetter agreement with dynamic cluster approximation. The considered method israther general and can be applied to study various phenomena instrongly-correlated electronic systems.

physical review. b./physical review. b

The (extended) dynamical mean field theory combined with the  two-particle irreducible functional renormalization-group approach as a tool  to study strongly-correlated systems