Abstract
A variational wave function with spin zero is presented for the infinite-U Hubbard model on a square lattice with the hole concentration δ=0.5. We find that the Nagaoka ferromagnetic state is unstable for this case in the thermodynamic limit. Some discussion about this method for other hole concentrations is given.
- Received 6 October 1993
DOI:https://doi.org/10.1103/PhysRevB.49.6723
©1994 American Physical Society
