Pseudogap opening in the two-dimensional Hubbard model: A functional renormalization group analysis

15 Jul 2020 Hille Cornelia Rohe Daniel Honerkamp Carsten Andergassen Sabine

Using the recently introduced multiloop extension of the functional renormalization group, we compute the frequency- and momentum-dependent self-energy of the two-dimensional Hubbard model at half filling and weak coupling. We show that, in the truncated-unity approach for the vertex, it is essential to adopt the Schwinger-Dyson form of the self-energy flow equation in order to capture the pseudogap opening... (read more)

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  • STRONGLY CORRELATED ELECTRONS