One particle spectral weight of the three dimensional single band Hubbard model

Details One particle spectral weight of the three dimensional single band Hubbard model One particle spectral weight of the three dimensional single band Hubbard model

1996-09-26

arxiv.org/abs/cond-mat/9609255v2

Phys. Rev. B 54, 16523 (1996)

Physics

Condensed Matter

11 pages, REVTeX, 16 figures included using psfig.sty. Ref.30 corrected

Scientific paper

10.1103/PhysRevB.54.16523

Dynamic properties of the three-dimensional single-band Hubbard model are studied using Quantum Monte Carlo combined with the maximum entropy technique. At half-filling, there is a clear gap in the density of states and well-defined quasiparticle peaks at the top (bottom) of the lower (upper) Hubbard band. We find an antiferromagnetically induced weight above the naive Fermi momentum. Upon hole doping, the chemical potential moves to the top of the lower band where a robust peak is observed. Results are compared with spin-density-wave (SDW) mean-field and self consistent Born approximation results, and also with the infinite dimensional Hubbard model, and experimental photoemission (PES) for three dimensional transition-metal oxides.

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