Generalized String Order in the Spin-1/2 Alternating Heisenberg Chain
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概要
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The phase-dependent generalized string order introduced by Oshikawa in the VBS (valence bond solid)-type states of the integer spin chain is extended to the spin-1/2 J-J' alternating Heisenberg chain with antiferromagnetic J. The numerical diagonalization and the bosonization analysis show that the generalized string order remains finite in the ground state of the present model for -∞<J'<J, taking the maximum at J'=0. The characteristic feature of the phase dependence of the generalized string order also coincides with that of the spin-1 VBS state. This reconfirms the notion that the Haldane state of the spin-1 chain and the dimerized state of the alternating chain belong to a single phase characterized by the local singlet-type correlation.
- 社団法人日本物理学会の論文
- 1993-02-15
著者
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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 College Of Liberal Arts Saitama University
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