| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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120° Ordered Phase of Triangular Lattice Antiferromagnetic Heisenberg Model with Long Range Couplings |
| DONG Zhan-Hai |
| Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 |
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| Cite this article: |
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DONG Zhan-Hai 2009 Chin. Phys. Lett. 26 107503 |
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Abstract In order to look for the 120° order phase of triangular lattice Heisenberg antiferromagnet with long range couplings, the Hamiltonian is diagonalized with the Bogoliubov transformation within linear spin-wave approximation. It is found that when the long range spin couplings are taken into account, the transformation is valid only for certain regions in the spin coupling parameter space. These regions just correspond to the 120° (or Néel) ordered phase, which is very different from square lattice in terms of shape, size and topological property.
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| Keywords:
75.30.Ds
75.50.Ee
74.25.Ha
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Received: 29 June 2009
Published: 27 September 2009
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| PACS: |
75.30.Ds
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(Spin waves)
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75.50.Ee
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(Antiferromagnetics)
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74.25.Ha
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(Magnetic properties including vortex structures and related phenomena)
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[10] Moreo A et al 1990 Phys. Rev. B 42 6283 |
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