Many-body correlations in quantum antiferromagnets: A microscopic coupled-cluster approach

R. F. Bishop, J. B. Parkinson, Yang Xian

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    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.
    Original languageEnglish
    Pages (from-to)13782-13785 [Rapid Communication]
    Number of pages4
    JournalPhysical Review B (Condensed Matter and Materials Physics)
    Volume43
    DOIs
    Publication statusPublished - 1991

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