SciPost logo

Quasi-particle functional renormalisation group calculations in the two-dimensional t-t'-Hubbard model

Daniel Rohe

SciPost Phys. 15, 192 (2023) · published 13 November 2023

Abstract

We extend and apply a recently introduced quasi-particle functional renormalisation group scheme to the two-dimensional Hubbard model with next-nearest-neighbour hopping and away from half filling. We confirm the generation of superconducting correlations in some regions of the phase diagram, but also find that the inclusion of self-energy feedback by means of a decreasing quasi-particle weight can suppress superconducting tendencies more than anti-ferromagnetic correlations by which they are generated. As a supplement, we provide sample results for the self-energy in second-order perturbation theory and address some conceptual matters.

Cited by 1

Crossref Cited-by

Author / Affiliation: mappings to Contributors and Organizations

See all Organizations.