Abstract
It is shown that in a planar degenerate system on a square lattice with dipole-dipole interactions of electric or magnetic moments the thermodynamic fluctuations destroy the Goldstone mode in the spectrum of orientational oscillations. This gives rise to layered antiferroelectric structures characterized by a nonzero long-range orientational order parameter, which in the low-temperature limit is proportional to exp(−T¦lnT¦).
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Pis’ma Zh. Éksp. Teor. Fiz. 63, No. 8, 623–627 (25 April 1996)
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Rozenbaum, V.M. Long-range orientational order in a two-dimensional degenerate system of dipoles on a square lattice. Jetp Lett. 63, 662–667 (1996). https://doi.org/10.1134/1.567084
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DOI: https://doi.org/10.1134/1.567084