Effect of valence fluctuation in heavy fermion superconductors under pressure
| Project/Area Number |
23540419
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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 | University of the Ryukyus |
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Principal Investigator |
ASO Naofumi 琉球大学, 理学部, 准教授 (40313118)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Keywords | 重い電子 / 超伝導 / 価数揺らぎ / 量子臨界点 / 低温物性 / 圧力磁化 / 中性子散乱 / 圧力下磁化 / 中性子 |
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| Research Abstract |
In this investigation, we found new information of the relationship between superconductivity and antiferromagnetism in vicinity of quantum critical point by means of the physical properties measurements under pressure of a single-crystalline CeIrIn5, in which it has been pointed out that valence fluctuation takes place near the quantum criticality point by theory,
Next, we focus on a pressure-induced antiferromagnet YbCo2Zn20 with the smallest quantum critical pressure in Yb-based heavy fermion compounds. We succeeded in the single-crystalline doped YbCo2Zn20 and found new information of its pressure effect.
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Report
(4 results)
Research Products
(42 results)
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[Presentation] Physical properties under pressure in a heavy fermion superconductor CeIrIn52012
Author(s)
Naofumi Aso, Y. Tamaki, Y. Takaesu, M. Hedo, T. Nakama, K. Uchima, K. Matsubayashi, Y. Uwatoko, Y. Ishikawa, K. Deguchi, N. K. Sato
Organizer
The 19th International Conference on Magnetism (ICM 2012)
Place of Presentation
Bexco, Busan, South Korea
Year and Date
2012-07-09
Related Report
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[Presentation] Electrical Resistivity of a Heavy Fermion Superconductor CeIrIn5 under High Pressure up to 8.0 Gpa2011
Author(s)
Y. Takaesu, N. Aso, Y. Tamaki, M. Hedo, T. Nakama, K. Uchima, K. Matsubayashi, Y. Uwatoko, Y. Ishikawa, K. Deguchi, N. K. Sato
Organizer
23rd AIRAPT International Conference on High Pressure Science & Technology (AIRAPT-23)
Place of Presentation
Bhabha Atomic Research Centre, Mumbai, India
Year and Date
2011-09-29
Related Report
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