2013 Fiscal Year Final Research Report
NMR study under high pressure: investigation of superconductivity induced by orbital fluctuations and superconductivity accompanied by antiferromagnetic ordering
| Project/Area Number |
23340101
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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 | Kyoto University |
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Principal Investigator |
FUJIWARA Naoki 京都大学, 人間・環境学研究科(研究院), 准教授 (60272530)
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| Co-Investigator(Kenkyū-buntansha) |
UWATOKO Yoshiya 東京大学, 物性研究所, 教授 (40213524)
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| Co-Investigator(Renkei-kenkyūsha) |
HOSONO Hideo 東京工業大学, フロンティアリサーチセンター, 教授 (30157028)
TAKAHASHI Hiroki 日本大学, 文理学部, 教授 (80188044)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 高温超伝導 / 核磁気共鳴 / 高圧技術 / 相転移 / 鉄ヒ素系化合物 / スピン密度波 |
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| Research Abstract |
To investigate the possibility of superconductivity induced by orbital fluctuations, we performed nuclear-magnetic-resonance measurements on LaFeAsO1-xHx in a heavily electron-doped regime where spin fluctuations are supposed to be fairly small. We unexpectedly discovered antiferromagnetic ordering in this regime and obtained a brand-new electronic phase diagram, contrary to the commonly-believed expectation in the field of strongly electron systems.
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