Phys. Rev. B 42, 810–819 (1990)Dynamic correlations in a classical two-dimensional Heisenberg antiferromagnetReceived 1 February 1990; published in the issue dated 1 July 1990 A Monte Carlo molecular-dynamics calculation of the dynamic structure function S(q,ω) for the classical two-dimensional isotropic Heisenberg antiferromagnet is presented. For wave vectors near the antiferromagnetic Bragg point, S(q,ω) is well described by a product of Lorentzians representing damped spin waves. For adequately low temperatures, the dependence of the spin-wave frequency and damping on wave vector and temperature are consistent with a dynamic scaling description of Chakravarty, Halperin, and Nelson. Even for higher temperatures a scaling description is quite well satisfied, but with a modified scaling frequency. © 1990 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.42.810
DOI:
10.1103/PhysRevB.42.810
PACS:
75.40.Gb, 75.40.Mg, 75.10.Hk
See AlsoComment: Edward B. Brown, Comment on ‘‘Dynamic correlations in a classical two-dimensional Heisenberg antiferromagnet’’, Phys. Rev. B 45, 10809 (1992). Reply: G. M. Wysin and A. R. Bishop, Reply to “Comment on ‘Dynamic correlations in a classical two-dimensional Heisenberg antiferromagnet’ ”, Phys. Rev. B 45, 10812 (1992). |
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