TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.15.5.192
TI  - Quasi-particle functional renormalisation group calculations in the  two-dimensional t-t'-Hubbard model
PY  - 2023/11/13
UR  - https://scipost.org/SciPostPhys.15.5.192
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 15
IS  - 5
SP  - 192
A1  - Rohe, Daniel
AB  - 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.
ER  -

@Article{10.21468/SciPostPhys.15.5.192,
	title={{Quasi-particle functional renormalisation group calculations in the  two-dimensional t-t'-Hubbard model}},
	author={Daniel Rohe},
	journal={SciPost Phys.},
	volume={15},
	pages={192},
	year={2023},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.15.5.192},
	url={https://scipost.org/10.21468/SciPostPhys.15.5.192},
}