3 papers
cond-mat.str-el2022
Functional renormalization of spinless triangular-lattice fermions: -patch vs. truncated-unity scheme
Nico Gneist, Dominik Kiese, Ravn Henkel +3
We study competing orders of spinless fermions in the triangular-lattice Hubbard model with nearest-neighbor interaction. We calculate the effective, momentum-resolved two-particle…
cond-mat.str-el2022
Competing instabilities of the extended Hubbard model on the triangular lattice: Truncated-unity functional renormalization group and application to moiré materials
Nico Gneist, Laura Classen, Michael M. Scherer
A simple yet paradigmatic model for the interplay of strong electronic correlations and geometric frustration is the triangular lattice Hubbard model. Recently it was proposed that…
cond-mat.str-el2019
Cluster functional renormalization group and absence of a bilinear spin liquid in the --Heisenberg model
Dietrich Roscher, Nico Gneist, Michael M. Scherer +2
The pseudofermion functional renormalization group (pf-FRG) has been put forward as a semi-analytical scheme that, for a given microscopic spin model, allows to discriminate whethe…