NQR Study of Superconducting Mechanism mediated by Valence Fluctuations
| Project/Area Number |
21540338
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Shimane University |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2009: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Keywords | 磁気共鳴 / 超伝導 / 重い電子系 / 価数揺らぎ / 引力機構 / 核磁気共鳴 |
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| Research Abstract |
We study mechanism of exotic superconductivity in strongly correlated electron system under high pressure, and challenge to elucidate novel pairing interactions(valence and/or orbital fluctuations), resulting in strong coulomb interaction between the electrons. NQR frequency(^<63>ν_Q) for^<63> Cu nuclei in CeCu_2Si_2 deviates from the linear pressure dependence. The observed downward deviation of^<63>ν_Q is associated with increase of Ce valence. Above 4. 5 GPa, the linear relation of^<63>ν_Q is observed again, closely related to sharp crossover to high valence state.
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Report
(4 results)
Research Products
(52 results)
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[Presentation] U_3P_4の圧力誘起強磁性・非磁性転移2010
Author(s)
荒木新吾, 真鍋博紀, 小林達生, 稲田佳彦, 村田恵三, P.Wisniewski, 青木大, 大貫惇睦, 山本悦嗣, 芳賀芳範, 藤原賢二
Organizer
日本物理学会第65回年次大会
Place of Presentation
岡山大学(岡山市)
Year and Date
2010-03-21
Related Report
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