2013 Fiscal Year Final Research Report
Elaborate search of exotic phases and level spectroscopy in quantum spin chains
| Project/Area Number |
23540388
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
OKAMOTO Kiyomi 東京工業大学, 理工学研究科, 助教 (10114860)
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| Co-Investigator(Kenkyū-buntansha) |
TONEGAWA Takashi 神戸大学, 理学研究科, 名誉教授 (80028167)
NOMURA Kiyohide 九州大学, 理学研究院, 准教授 (70222205)
NAKANO Hiroki 兵庫県立大学, 物質理学研究科, 助教 (00343418)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 磁性 / 量子スピン / 量子相転移 / レベルスペクトロスコピー / 数値対角化 |
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| Research Abstract |
The level spectroscopy is a method for analyzing the numerical data of quantum spin chains to find quantum critical points very accurately, which was developed by our group. We applied the level spectroscopy method to several models, to find exotic phases, and also to obtain precise phase diagrams. For the anisotropic S=2 quantum spin chain, we found the intermediate-D phase for the first time, which was proposed about 20 years ago and has been thought to be absent for long years. Also we obtained a deterministic conclusion for the parameter problem of the magnetism of azurite, which has been in controversy for many years.
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[Presentation] スピンナノチューブの物理2013
Author(s)
坂井徹, 佐藤正寛, 奥西巧一, 岡本清美, 大塚雄一, 糸井千岳
Organizer
日本物理学会2013年秋季大会
Place of Presentation
徳島大学常三島キャンパス
Year and Date
2013-09-28
Invited
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