Correlation-Driven Lifshitz Transition at the Emergence of the Pseudogap Phase in the Two-Dimensional Hubbard Model

Physical Review Letters
Helena BragançaMarcello Civelli

Abstract

We study the relationship between the pseudogap and Fermi-surface topology in the two-dimensional Hubbard model by means of the cellular dynamical mean-field theory. We find two possible mean-field metallic solutions on a broad range of interactions, doping, and frustration: a conventional renormalized metal and an unconventional pseudogap metal. At half filling, the conventional metal is more stable and displays an interaction-driven Mott metal-insulator transition. However, for large interactions and small doping, a region that is relevant for cuprates, the pseudogap phase becomes the ground state. By increasing doping, we show that a first-order transition from the pseudogap to the conventional metal is tied to a change of the Fermi surface from hole- to electronlike, unveiling a correlation-driven mechanism for a Lifshitz transition. This explains the puzzling link between the pseudogap phase and Fermi surface topology that has been pointed out in recent experiments.

References

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Citations

Dec 13, 2017·Nature Communications·N Doiron-LeyraudLouis Taillefer
Nov 16, 2019·Nature Communications·N AuvrayY Gallais
Nov 2, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·M FidrysiakJ Spałek
Oct 5, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Edoardo SterpettiAbhay Shukla

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