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Field-induced multiple reentrant quantum phase transitions in randomly dimerized antiferromagnetic S=1/2 Heisenberg chains
https://sucra.repo.nii.ac.jp/records/12524
https://sucra.repo.nii.ac.jp/records/1252400e71116-3ce7-4cec-905b-97b7e2024d86
名前 / ファイル | ライセンス | アクション |
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A1002155.pdf (329.3 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2007-03-08 | |||||
タイトル | ||||||
タイトル | Field-induced multiple reentrant quantum phase transitions in randomly dimerized antiferromagnetic S=1/2 Heisenberg chains | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
飛田, 和男
× 飛田, 和男 |
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著者 ローマ字 | ||||||
Hida, Kazuo | ||||||
著者 所属 | ||||||
埼玉大学大学院理工学研究科 | ||||||
著者 所属(別言語) | ||||||
Saitama University, Graduate School of Science and Engineering | ||||||
書誌情報 |
Journal of the Physical Society of Japan 巻 75, 号 7, p. 074709-1-074709-5, 発行日 2006 |
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年月次 | ||||||
2006 | ||||||
出版者名 | ||||||
出版者 | Physical Society of Japan | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00319015 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1143/JPSJ.75.074709 | |||||
関連サイト | ||||||
内容記述タイプ | Other | |||||
内容記述 | http://jpsj.ipap.jp/link?JPSJ/75/074709 | http://jpsj.ipap.jp/link?JPSJ/75/074709 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The multiple reentrant quantum phase transitions in the S = 1/2 antiferromagnetic Heisenberg chains with random bond alternation in the magnetic field are investigated by the density matrix renormalization group method combined with interchain mean field approximation. It is assumed that odd numbered bonds are antiferromagnetic with strength J and even numbered bonds can take the values JS and JW (JS > J > JW > 0) randomly with the probabilities p and 1−p, respectively. The pure version (p = 0 and p = 1) of this model has a spin gap but exhibits a field-induced antiferromagnetism in the presence of interchain coupling if Zeeman energy due to the magnetic field exceeds the spin gap. For 0 < p < 1, antiferromagnetism is induced by randomness at the small field region where the ground state is disordered due to the spin gap in the pure version. At the same time, this model exhibits randomness-induced plateaus at several values of magnetization. The antiferromagnetism is destroyed on the plateaus. As a consequence, we find a series of reentrant quantum phase transitions between transverse antiferromagnetic phases and disordered plateau phases with the increase of magnetic field for a moderate strength of interchain coupling. Above the main plateaus, the magnetization curve consists of a series of small plateaus and jumps between them. It is also found that antiferromagnetism is induced by infinitesimal interchain coupling at the jumps between the small plateaus. We conclude that this antiferromagnetism is supported by the mixing of low-lying excited states by the staggered interchain mean field even though the spin correlation function is short ranged in the ground state of each chain. | |||||
注記 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Copyright(c)2006 The Physical Society of Japan | |||||
版 | ||||||
[著者版] | ||||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
資源タイプ | ||||||
内容記述タイプ | Other | |||||
内容記述 | text | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
作成日 | ||||||
日付 | 2007-03-05 | |||||
日付タイプ | Created | |||||
アイテムID | ||||||
A1002155 |