摘要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.
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.
(Magnetic properties including vortex structures and related phenomena)
引用本文:
DONG Zhan-Hai. 120° Ordered Phase of Triangular Lattice Antiferromagnetic Heisenberg Model with Long Range Couplings[J]. 中国物理快报, 2009, 26(10): 107503-107503.
DONG Zhan-Hai. 120° Ordered Phase of Triangular Lattice Antiferromagnetic Heisenberg Model with Long Range Couplings. Chin. Phys. Lett., 2009, 26(10): 107503-107503.
[1] Bogoliubov N N 1947 J. Phys. (USSR) 11 23 [2] Dong Z H 2004 Solid State Commun. 130 301 [3] Takada K et al 2003 Nature 422 53 [4] Qian D, Wray L et al 2006 Phys. Rev. Lett. 96046407 [5] Hasan M Z et al 2004 Phys. Rev. Lett. 92246402 [6] Schaak R E, Klimczuk T, Foo M L and Cava R J 2003 Nature 424 527 [7] McKenzie R H 1997 Science 278 820 [8] Miyake S J 1985 Prog. Theor. Phys. 74 468 [9] Leung P W and Runge K J 1993 Phys. Rev. B 475861 [10] Moreo A et al 1990 Phys. Rev. B 42 6283
2009, Vol. 26 
