Order of Two-Dimensional Isotropic Dipolar Antiferromagnets
arXiv:cond-mat/9301033 · doi:10.1103/PhysRevB.47.7957
Abstract
The question of the existence of order in two-dimensional isotropic dipolar Heisenberg antiferromagnets is studied. It is shown that the dipolar interaction leads to a gap in the spin-wave energy and a nonvanishing order parameter. The resulting finite Néel-temperature is calculated for a square lattice by means of linear spin-wave theory.
10 pages, REVTEX, 1 figure available upon request, TUM-CP-93-01