Sine-Gordon theory of the non-Néel phase of two-dimensional quantum antiferromagnets
- 1 August 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 40 (4) , 2704-2707
- https://doi.org/10.1103/physrevb.40.2704
Abstract
We examine a recently developed sine-Gordon model description of the non-Néel phase of quantum antiferromagnets on two-dimensional bipartite lattices. Using a spatial dimensionality d=1+ε expansion we argue that the model always scales to its strong-coupling limit and displays spin Peierls or valence-bond-solid order. The structure of the theory in this strong-coupling limit bears a remarkable resemblance to a fermionic large-N limit of the nearest-neighbor SU(N) antiferromagnet.Keywords
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