Quantum vs Classical Magnetization Plateaus of <i>S</i>=1/2 Frustrated Heisenberg Chains
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- Hida Kazuo
- Department of Physics, Faculty of Science, Saitama University
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- Affleck Ian
- Department of Physics and Astronomy, University of British Columbia
書誌事項
- タイトル別名
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- Quantum vs Classical Magnetization Plateaus of S=1/2 Frustrated Heisenberg Chains
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The competition between quantum and classical magnetization plateaus of S=1⁄2 frustrated Heisenberg chains with modified exchange couplings is investigated. The conventional S=1⁄2 frustrated Heisenberg chain is known to exhibit a 3-fold degenerate ↑↓↑-type classical plateau at 1/3 of the saturation magnetization accompanied by the spontaneous Z3 translational symmetry breakdown. The stability of this plateau phase against period 3 exchange modulation which favors the •\\hskip−1pt-\\hskip−1pt•↑-type quantum plateau state (•\\hskip−1pt-\\hskip−1pt• = singlet dimer) is studied by bosonization, renormalization group and numerical diagonalization methods. The ground state phase diagram and the spin configuration in each phase are numerically determined. The translationally invariant Valence Bond Solid-type model with 4-spin and third neighbor interactions, which has the exact •\\hskip−1pt-\\hskip−1pt•↑-type quantum plateau state, is also presented. The phase transition to the classical ↑↓↑-type ground state is also observed by varying the strength of 4-spin and third neighbor interactions. The relation between these two types of models with quantum plateau states is discussed.
収録刊行物
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 74 (6), 1849-1857, 2005
一般社団法人 日本物理学会
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詳細情報 詳細情報について
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- CRID
- 1390282679164205824
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- NII論文ID
- 110001979623
- 210000105508
- 130004539285
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- NII書誌ID
- AA00704814
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- BIBCODE
- 2005JPSJ...74.1849H
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 7336170
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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