Order of Two-Dimensional Isotropic Dipolar Antiferromagnets

Details Order of Two-Dimensional Isotropic Dipolar Antiferromagnets Order of Two-Dimensional Isotropic Dipolar Antiferromagnets

1993-01-26

arxiv.org/abs/cond-mat/9301033v1

Physics

Condensed Matter

10 pages, REVTEX, 1 figure available upon request, TUM-CP-93-01

Scientific paper

10.1103/PhysRevB.47.7957

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 N\'eel-temperature is calculated for a square
lattice by means of linear spin-wave theory.

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