2014 Fiscal Year Final Research Report
NMR study of heavy-fermion and iron-based supeconductors
| Project/Area Number |
24540372
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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 | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
|
| Keywords | 超伝導 / 強相関電子系 / 磁気共鳴 / 圧力効果 |
|---|
| Outline of Final Research Achievements |
In this research project, I obtained impotant NQR experimental results in the field of the heavy-fermion superconductivity. It is generally considered that spin fluctuation induces superconductivity in many heavy-fermion superconductos. However, I suggested that superconductivity is derived from some kind of fluctuations except for spin ones in heavy-fermion compound CeIrIn5. It is probable that the fluctuation related with the occurence of superconductivity in CeIrIn5 is electric rather than magnetic. Next, I added a magnetic interaction to CeIrIn5 by the Cd doping. The addition of a magnetic interaction leads to the increase in Tc, suggesting that the collaboration of two interactions (maybe spin and electric fluctuations) is able to enhance Tc. I belive that this important experimental result contributes to the realization of a room temperature superconductor.
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| Free Research Field |
物性物理
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