Phys. Rev. B 44, 3391–3394 (1991)Quasiparticle properties of the two-dimensional Hubbard model in a propagator-renormalized fluctuation-exchange approximation
We calculate the self-energy and thermodynamic potential of the two-dimensional Hubbard model in a propagator-renormalized conserving approximation, for lattices as large as 128×128 and temperatures as low as 0.002 times the bandwidth. For densities near quarter filling we see no evidence of deviations from the predictions of Fermi-liquid theory, such as those expected in a Luttinger liquid or a marginal Fermi liquid. © 1991 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.44.3391
DOI:
10.1103/PhysRevB.44.3391
PACS:
74.20.-z, 74.70.Vy
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