Many-body correlations in quantum antiferromagnets: A microscopic coupled-cluster approach
- 1 June 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 43 (16) , 13782-13785
- https://doi.org/10.1103/physrevb.43.13782
Abstract
The coupled-cluster method of many-body theory is applied to anisotropic quantum antiferromagnets in one and two dimensions. It is found to give good results for ground-state and excited-state energies and the staggered magnetization. It also gives a qualitatively correct description of the entire one-dimensional Heisenberg-Ising phase and the phase change in one dimension as the anisotropy decreases.Keywords
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