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Exact diagonalization study of the spin-1 two-dimensional [formula omitted] Heisenberg model on a triangular lattice

Authors
Journal
Physics Letters A
0375-9601
Publisher
Elsevier
Identifiers
DOI: 10.1016/j.physleta.2014.10.010
Keywords
  • Condensed Matter
Disciplines
  • Physics

Abstract

Abstract The spin-1 Heisenberg model on a triangular lattice with the ferromagnetic nearest- and antiferromagnetic third-nearest-neighbor exchange interactions, J1=−(1−p)J and J2=pJ, J>0(0≤p≤1), is studied with the use of the SPINPACK code. This model is applicable for the description of the magnetic properties of NiGa2S4. The ground, low-lying excited state energies and spin-spin correlation functions have been found for lattices with N=16 and N=20 sites with the periodic boundary conditions. These results are in qualitative agreement with earlier authors' results obtained with Mori's projection operator technique.

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