2014 Fiscal Year Final Research Report
Theory of Novel Quantum Phenomena Created by Spin, Charge, and Chirality in the Spin Nanotube
| Project/Area Number |
23340109
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | University of Hyogo |
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Principal Investigator |
SAKAI TORU 兵庫県立大学, 物質理学研究科, 教授 (60235116)
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| Co-Investigator(Kenkyū-buntansha) |
NAKANO Hiroki 兵庫県立大学, 大学院物質理学研究科, 助教 (00343418)
HIJII Keigo 日本原子力研究開発機構, 量子ビーム応用研究センター, 博士研究員 (00444068)
OKAMOTO Kiyomi 東京工業大学, 大学院理工学研究科, 助教 (10114860)
ISODA Makoto 香川大学, 教育学部, 教授 (10184590)
OKUNISHI Kouichi 新潟大学, 自然科学系, 准教授 (30332646)
TONEGAWA Takashi 神戸大学, 理学研究科, 名誉教授 (80028167)
NOMURA Takuji 日本原子力研究開発機構, 量子ビーム応用研究センター, 研究員 (90373240)
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| Project Period (FY) |
2011-04-01 – 2015-03-31
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| Keywords | 量子スピン系 / ナノチューブ / スピンギャップ / フラストレーション / 量子相転移 / カイラリティ |
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| Outline of Final Research Achievements |
The spin nanotube was theoretically investigated using the large-scale numerical diagonalization and density matrix renormalization group analysis. We found a novel quantum phase transition from the spin gap phase to the gapless spin liquid phase with respect to the spin anisotropy. It was also found that the quantum multispin exchange interaction induces another spin gap phase based on a different mechanism. In addition our theoretical study predicted a novel magnetic field induced phase, which is the chiral liquid phase.
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| Free Research Field |
物性理論、計算物理学
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