| Project/Area Number |
19340086
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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 | Hokkaido University |
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Principal Investigator |
AMITSUKA Hiroshi Hokkaido University, 大学院・理学研究院, 教授 (40212576)
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| Co-Investigator(Kenkyū-buntansha) |
TENYA Kenichi 信州大学, 教育学部, 准教授 (70261279)
横山 淳 茨城大学, 理学部, 准教授 (70361285)
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| Co-Investigator(Renkei-kenkyūsha) |
HIDAKA Hiroyuki 北海道大学, 大学院・理学研究院, 助教 (90466459)
YANAGISAWA Tatsuya 北海道大学, 創成研究機構, 特任助教 (10456353)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
Fiscal Year 2009: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2008: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2007: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
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| Keywords | 重い電子系 / 隠れた秩序 / 異方的超伝導 / 高次多極子 / 反強磁性 / ウラン化合物 / アクチナイド / 5f電子系 |
|---|
| Research Abstract |
We have obtained, for the first time, microscopic evidence that weak antiferromagnetism of the 5f-electron superconductor URu_2Si_2 is ascribed to an inhomogeneous antiferromagetic order induced by a residual stress in a crystal. We have further shown that the superconductivity of this system does not coexist with the antiferromagnetism but does occur only in the unknown ordered state called "hidden order". Some new findings have also been obtained from the study of related materials, regarding electronic properties in the vicinity of quantum phase transitions and magnetism of 5f-electron systems.
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