Band Kondo Effect in the Doped 2D Hubbard Model

Details Band Kondo Effect in the Doped 2D Hubbard Model Band Kondo Effect in the Doped 2D Hubbard Model

1998-02-24

arxiv.org/abs/cond-mat/9802250v1

Physics

Condensed Matter

4 pages, 5 figures, revtex

Scientific paper

We present strong numerical evidence for the band Kondo effect in the doped 2D Hubbard model by showing the systematic change of the density of states, imaginary part of the self-energy, effective magnetic moment and quasiparticle residue upon decreasing the temperature. Quadratically vanishing (in frequency) scattering rates near the Fermi energy and a linearly vanishing (in temperature) effective magnetic moment at low temperatures strongly support the screening of magnetic moments from singly occupied electrons by doped holes in the 2D Hubbard model.

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