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- W2091068737 abstract "Using large-scale dynamical cluster quantum Monte Carlo simulations, we study the Lifshitz transition of the two-dimensional Hubbard model with next-nearest-neighbor hopping (${t}^{ensuremath{'}}$), chemical potential, and temperature as control parameters. At ${t}^{ensuremath{'}}ensuremath{le}0$, we identify a line of Lifshitz transition points associated with a change in the Fermi surface topology at zero temperature. In the overdoped region, the Fermi surface is complete and electron-like; across the Lifshitz transition, the Fermi surface becomes hole-like and develops a pseudogap. At (or very close to) the Lifshitz transition points, a van Hove singularity in the density of states crosses the Fermi level. The van Hove singularity occurs at finite doping due to correlation effects and becomes more singular when ${t}^{ensuremath{'}}$ becomes more negative. The resulting temperature dependence on the bare $d$-wave pairing susceptibility close to the Lifshitz points is significantly different from that found in the traditional van Hove scenarios. Such unambiguous numerical observation of the Lifshitz transition at ${t}^{ensuremath{'}}ensuremath{le}0$ extends our understanding of the quantum critical region in the phase diagram and shines lights on future investigations of the nature of the quantum critical point in the two-dimensional Hubbard model." @default.
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- W2091068737 date "2012-10-31" @default.
- W2091068737 modified "2023-09-23" @default.
- W2091068737 title "Lifshitz transition in the two-dimensional Hubbard model" @default.
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- W2091068737 doi "https://doi.org/10.1103/physrevb.86.165136" @default.
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