Abstract
Working on a square lattice with an even number of sites and assuming a smooth connection between strong and weak coupling, we show that the ground state of the two-dimensional half-filled Hubbard model has momentum -=0, it is even under reflections, and transforms as an s wave under rotations when N/2 is even and as a d wave when N/2 is odd.
- Received 11 September 1989
DOI:https://doi.org/10.1103/PhysRevB.41.9488
©1990 American Physical Society