| Project/Area Number |
26400359
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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 | Kobe University |
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Principal Investigator |
TOU Hideki 神戸大学, 理学研究科, 教授 (60295467)
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| Co-Investigator(Kenkyū-buntansha) |
小手川 恒 神戸大学, 理学研究科, 准教授 (30372684)
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| Research Collaborator |
KUBO Tetsuro 神戸大
MATSUNO Haruki 神戸大
KISHIMOTO Yasuki 神戸大
AOYAMA Taisuke 神戸大
MIYAKE Ryoma 神戸大
NAKASE Jin 神戸大
HIGASHINAKA Ryuji 首都大学東京
AOKI Yuji 首都大学東京
SASAKI Takahiko 東北大金研
HARIMA Hisatomo 神戸大
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 多極子 / 結晶場 / 核磁気共鳴 / 強相関電子 / 非フェルミ流体 / 混成効果 / 多極子秩序 / 多極子相互作用 / 近藤効果 / 非クラマース結晶場 / 核四重極共鳴 / 四極子自由度 |
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| Outline of Final Research Achievements |
We have carried out nuclear magnetic resonance measurements on PrT2Al20 that exhibits various ground states, such as, superconductivity, quadrupole order, and non-Fermi liquid state, etc. The present studies evidence that the crystal electric field (CEF) state is composed of the non-magnetic doublet CEF ground and the magnetic triplet CEF 1st excited states. Temperature dependence of the NMR relaxation rate of PrNb2Al20 clearly shows that the characteristic temperature for the cf mixing between conduction electron and f-electron states is estimated to be 80 Kelvin. Systematic analyses for other PrT2Al20 strongly suggest that the various ground state properties come from the quasi-quintet CEF state owing to the competition between the cf-mixing and the nonmagnetic doublet CEF ground state.
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