The Spin-1 Heisenberg Antiferromagnet: New Results from Series Expansions

2008/04/08 by J. Oitmaa, Oitmaa, J., C. J. Hamer +1 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Other Condensed Matter (cond-mat.other) #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #Theoretical and Computational Physics #cond-mat.other #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.0804.1171

13 pages, 13 figures

arxiv created 2008/04/08 · openalex publication_date 2008/04/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We calculate ground state properties (energy, magnetization, susceptibility) and one-particle spectra for the S = 1 Heisenberg antiferromagnet with easy-axis or easy-plane single site anisotropy, on the square lattice. Series expansions are used, in each of three phases of the system, to obtain systematic and accurate results. The location of the quantum phase transition in the easy-plane sector is determined. The results are compared with spin-wave theory.

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• Pseudospin S=1 formalism and skyrmion-like excitations in the three body constrained extended Bose-Hubbard model

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