Ground-state properties of the square-lattice Hubbard model at half filling
- 1 October 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 46 (14) , 9231-9233
- https://doi.org/10.1103/physrevb.46.9231
Abstract
On the basis of the generalized spin-wave theory, which treats the collective transverse spin fluctuations as the main perturbation to the ground state of the mean-field theory, we calculate the ground-state energy, the spin-wave velocity, and the sublattice magnetization of the square-lattice Hubbard model at half filling. In the very-strong-coupling limit, all the results are shown to be in agreement with the ordinary spin-wave theory.Keywords
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