Gapless Spin-Liquid Phase in an Extended Spin 1/2 Triangular Heisenberg Model
書誌事項
- 公開日
- 2014-09
- 資源種別
- journal article
- DOI
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- 10.7566/jpsj.83.093707
- 10.48550/arxiv.1407.0318
- 公開者
- Tokyo : Physical Society of Japan
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説明
We numerically study the Heisenberg models on triangular lattices by extending it from the simplest equilateral lattice with only the nearest-neighbor exchange interaction. We show that, by including an additional weak next-nearest-neighbor interaction, a quantum spin-liquid phase is stabilized against the antiferromagnetic order. The spin gap (triplet excitation gap) and spin correlation at long distances decay algebraically with increasing system size at the critical point between the antiferromagnetic phase and the spin-liquid phase. This algebraic behavior continues in the spin-liquid phase as well, indicating the presence of an unconventional critical (algebraic spin-liquid) phase characterized by the dynamical and anomalous critical exponents $z+��\sim1$. Unusually small triplet and singlet excitation energies found in extended points of the Brillouin zone impose constraints on this algebraic spin liquid.
5+4 pages, 4+2 figures
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 83 (9), 093707-, 2014-09
Tokyo : Physical Society of Japan
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詳細情報 詳細情報について
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- CRID
- 1521417754737880320
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- NII論文ID
- 40020194402
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- NII書誌ID
- AA00704814
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- ISSN
- 00319015
- 13474073
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- NDL書誌ID
- 025778833
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- 本文言語コード
- en
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- 資料種別
- journal article
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- NDL 雑誌分類
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- ZM35(科学技術--物理学)
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