Phase diagrams of a classical two-dimensional Heisenberg antiferromagnet with single-ion anisotropy

2004/04/30 by R. Leidl, W. Selke · 2 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat.mtrl-sci #cond-mat.stat-mech #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.70.174425

published as Phys. Rev. B 70, 174425 (2004) · 9 pages, 9 figures; final version as accepted by Phys. Rev. B (Fig. 5 replaced, added remarks in Secs. I, III, and V)

arxiv created 2004/09/21 · openalex publication_date 2004/11/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30

Abstract

A classical variant of the two-dimensional anisotropic Heisenberg model reproducing inelastic neutron scattering experiments on La₅Ca₉Cu₂₄O₄₁ [M. Matsuda et al., Phys. Rev. B 68, 060406(R) (2003)] is analyzed using mostly Monte Carlo techniques. Phase diagrams with external fields parallel and perpendicular to the easy axis of the anisotropic interactions are determined, including antiferromagnetic and spin-flop phases. Mobile spinless defects, or holes, are found to form stripes which bunch, debunch, and break up at a phase transition. A parallel field can lead to a spin-flop phase.

Citations

• Ordering, metastability and phase transitions in two-dimensional systems

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