Phys. Rev. Lett. 71, 1911–1914 (1993)New O(3) transition in three dimensionsReceived 9 July 1993; published in the issue dated 20 September 1993 A three-dimensional lattice of Heisenberg spins with nearest-neighbor interactions is studied by numerical simulation under the constraint that no free topological singularities (hedgehogs) are allowed. Only nearest-neighbor pairs of oppositely charged hedgehogs are permitted in the sum over configurations. A disordering transition with exponents different from the usual Heisenberg transition is found and tentatively identified as a pure spin wave disordering transition. © 1993 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.71.1911
DOI:
10.1103/PhysRevLett.71.1911
PACS:
75.10.Jm
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