Ground state phase transition in S=1 distorted kagome Heisenberg antiferromagnets
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概要
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Copyright(c)2002 The Physical Society of JapanThe ground state phase transition in the distorted S = 1 kagom´e Heisenberg antiferromagnet (KHAF) is studied by means of the perturbational calculation and numerical exact diagonalization method. For strong √3×√3 lattice distortion, the hexgonal singlet solid (HSS) ground state of the uniform KHAF is destroyed and a new singlet state, the large HSS (LHSS) state, which is globally different from the HSS state is realized. The quantum phase transition between these two singlet states is analogous to the Haldane-dimer transition in the S = 1 antiferromagnetic Heisenberg chain. The presence of this transition is fully consistent with the HSS picture of the ground state of the uniform S = 1 KHAF and supports the validity of this picture.
- 社団法人日本物理学会の論文
- 2002-04-15
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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