Ground state phase diagram of the distorted S=1 kagome Heisenberg antiferromagnets with single-site anisotropy
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概要
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Copyright(c)2002 The Physical Society of JapanThe ground state phase transitions in the distorted S = 1 kagom´e Heisenberg antiferromagnet (KHAF) with single-site anisotropy D are studied by the numerical exact diagonalization method. For strong easy plane anisotropy, the hexgonal singlet solid (HSS) ground state of the uniform KHAF is destroyed and large-D state is realized. The quantum phase transition between these two states is analogous to the Haldane-large-D transition in the S = 1 antiferromagnetic Heisenberg chain. The combined effect of the √3×√3 lattice distortion and single site anisotropy is also investigated. The ground state phase diagram expected from the numerical results is presented. The presence of this transition is consistent with the HSS picture of the ground state of the uniform S = 1 KHAF and supports its validity.
- 社団法人日本物理学会の論文
- 2002-12-15
著者
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Hida K
Saitama Univ. Saitama
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Hida Kazuo
Department Of Physics Faculty Of Science Saitama University
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Hida Kazuo
Department Of Engineering Science Faculty Of Engineering Hokkaido University
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HIDA Kazuo
Department of Physics, Saitama University
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HIDA Kazuo
Department of Physics, University of Tokyo
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