Destruction of Strong Critical Spin Fluctuations by Doping in the 2D Hubbard Model

Details Destruction of Strong Critical Spin Fluctuations by Doping in the 2D Hubbard Model Destruction of Strong Critical Spin Fluctuations by Doping in the 2D Hubbard Model

1998-02-12

arxiv.org/abs/cond-mat/9802129v2

Physics

Condensed Matter

4 pages, revtex, 5 figures

Scientific paper

We present the doping dependence of the spectral functions, density of states and low frequency behavior of the self-energy for the 2D Hubbard model on the basis of our recently developed theory for the Hubbard model. Strong 2D critical spin fluctuations dominating near half-filling are completely destroyed by 13 and 20 percent doping concentrations for U=4 and 8, respectively. Below these concentrations the imaginary part of the self-energy vanishes quadratically in frequency near the Fermi energy, a characteristic feature for the Fermi liquid.

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