Abstract
It is shown that, even near half filling, the elementary excitations of the large-U Hubbard model form wide bands of width ∼t, the intersite hopping integral, and that the slave-boson-based mean-field approximation is qualitatively wrong in the relevant limit. This large-U limit has no Kondo-type divergences.
- Received 13 February 1989
DOI:https://doi.org/10.1103/PhysRevB.40.723
©1989 American Physical Society
