Long-range orientational order in a two-dimensional degenerate system of dipoles on a square lattice
- 1 April 1996
- journal article
- Published by Pleiades Publishing Ltd in JETP Letters
- Vol. 63 (8), 662-667
- https://doi.org/10.1134/1.567084
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¦).Keywords
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