Spontaneous dimerization in theHeisenberg antiferromagnetic chain with competing interactions
- 1 April 1982
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 25 (7) , 4925-4928
- https://doi.org/10.1103/physrevb.25.4925
Abstract
Spontaneous dimerization is found in the isotropic Heisenberg antiferromagnetic chain with competing nearest- and next-nearest-neighbor exchange, , and results from the same umklapp processes that lead to the Néel state when easy-axis exchange anisotropy is present. Spontaneous and externally induced dimerizations are contrasted.
Keywords
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