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cond-mat.str-el2025★ 2 cited
Functional renormalization group for extremely correlated electrons
Jonas Arnold, Peter Kopietz, Andreas Rückriegel
At strong on-site repulsion , the fermionic Hubbard model realizes an extremely correlated electron system. In this regime, it is natural to derive the low-energy physics with…
cond-mat.str-el2025★ 1 cited
Bad Metal Behavior and Lifshitz Transition of a Nagaoka Ferromagnet
Jonas Arnold, Peter Kopietz, Andreas Rückriegel
Using an extension of the fermionic functional renormalization group for systems where strong correlations give rise to projected Hilbert spaces we calculate the phase diagram and…