Quasiparticle properties of the two-dimensional Hubbard model in a propagator-renormalized fluctuation-exchange approximation
- 15 August 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 44 (7), 3391-3394
- https://doi.org/10.1103/physrevb.44.3391
Abstract
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.Keywords
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