Systematic Inclusion of High-Order Multispin Correlations for the Spin-½XXZModels

1994/10/31 by R. F. Bishop, R. G. Hale, Y. Xian · 5 citations
Physics and Astronomy · #Ab initio #Advanced Condensed Matter Physics #Anisotropy #Computer science #Lattice (music) #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Spin (aerodynamics) #Statistical physics #Thermodynamics #cond-mat

paper · pdf · doi:10.1103/physrevlett.73.3157

published as Phys. Rev. Lett. 73 (1994), 3157-3160 · (to appear in PRL). 4 pages, ReVTeX, two figures available upon request. UMIST Preprint MA-000-0001

arxiv created 1994/10/31 · openalex publication_date 1994/12/05 · openalex created_date 2016/06/24 · arxiv updated 2017/08/24 · openalex updated_date 2026/08/05

Abstract

We apply the microscopic coupled-cluster method (CCM) to the spin-\textonehalf XXZ models on both the one-dimensional chain and the two-dimensional square lattice. Based on a systematic approximation scheme of the CCM developed by us previously, we carry out high-order ab initio calculations using computer-algebraic techniques. The ground-state properties of the models are obtained with high accuracy as functions of the anisotropy parameter. Furthermore, our CCM analysis enables us to study their quantum critical behavior in a systematic and unbiased manner.

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