2011 Fiscal Year Final Research Report
| Project Area | Novel States of Matter Induced by Frustration |
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| Project/Area Number |
19052004
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
UEDA Yutaka 東京大学, 物性研究所, 教授 (20127054)
MASUDA Takatsugu 東京大学, 物性研究所, 教授 (90313014)
KAKURAI Kazuhisa 日本原子力研究開発機構, 量子ビーム応用研究部門, 副部門長・上級研究主席 (00204339)
KAWASHIMA Naoki 東京大学, 物性研究所, 准教授 (30242093)
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| Project Period (FY) |
2007 – 2011
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| Keywords | フラストレーション / 量子スピン / 低次元 / 新物質 / 量子相転移 |
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| Research Abstract |
We have found various exotic quantum phenomena in 1D, 2D and 3D quantum frustrated systems, derived from competing antiferromagnetic and ferromagnetic interactions. 2D systems (CuX)An-1BnO_<3n+1> show novel phases such as a ferromagnetic Shastry-Sutherland spin singlet state ((CuCl)LaNb2O7) and a quantized magnetization state ((CuBr)Sr_2Nb_3O_<10>), and quantum phase separation. 1D system LiCuVO_4 exhibits an unprecedented magnetic state related to nematic state. 3D K_2Cr_8O_<16> exhibits a ferromagnetic metal to ferromagnetic insulator transition that is explained in terms of Peierls mechanism, and a theoretically predicted random fan out state is realized in Sr(Fe,Mn)O_2.
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