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J(1x)-J(1y)-J(2) square-lattice anisotropic Heisenberg model

Author:
Pires, A. S. T.  


Journal:
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS


Issue Date:
2017


Abstract(summary):

The spin one Heisenberg model with an easy-plane single-ion anisotropy and spatially anisotropic nearest-neighbor coupling, frustrated by a next-nearest neighbor interaction, is studied at zero temperature using a SU(3) Schwinger boson formalism (sometimes also referred to as flavor wave theory) in a mean field approximation. The local constraint is enforced by introducing a Lagrange multiplier. The enlarged Hilbert space of S =3D 1 spins lead to a nematic phase that is ubiquitous to S =3D 1 spins with single ion anisotropy. The phase diagram shows two magnetically ordered phase, separated by a quantum paramagnetic (nematic) phase. (C) 2017 Elsevier B.V. All rights reserved.


Page:
64---68


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