Research on novel quantum criticality and superconductivity in anisotropic heavy fermions
| Project/Area Number |
25800190
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 重い電子系 / 量子臨界現象 / 非従来型超伝導 / 非フェルミ液体 / 重い電子 / 軌道揺らぎ / 四極子近藤効果 / 多極子 / 価数揺らぎ / 異方的c-f混成 |
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| Outline of Final Research Achievements |
The origin of unusual heavy fermion formation under the strong valence fluctuations in α-, β-YbAlB4 has been investigated focusing on their strong anisotropy. We found the heavy fermion behavior is suppressed in the magnetic field above ~ 3 T only along the c-axis. In addition, we found a novel heavy fermion superconductivity arising from quantum fluctuation of f electron’s orbital degrees of freedom in PrV2Al20, which is a cage-like compound with a non-magnetic crystal electric field ground doublet.
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Report
(3 results)
Research Products
(45 results)
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[Presentation] Emergent critical phase in a correlated electron system2015
Author(s)
Yosuke Matsumoto, Takahiro Tomita, Kentaro Kuga, Eoin C. T. O’Farrell, Yasuyuki Shimura and Satoru Nakatsuji
Organizer
ISSP-MPIPKS Joint Workshop, "Dynamics of Strongly Correlated Systems"
Place of Presentation
ISSP, Univ. of Tokyo, Kashiwa, Chiba, Japan
Year and Date
2015-03-31
Related Report
Invited
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[Presentation] 単結晶α-YbAl1-xMnxB4の基礎物性と磁気相図2014
Author(s)
鈴木慎太郎, 志村恭通, 久我健太郎, 冨田崇弘, 松本洋介, 中辻知
Organizer
平成26年度物性研究所短期研究会「スクッテルダイト化合物及び関連物質を舞台とした強相関電子系物理の新展開」
Place of Presentation
東京大学物性研究所(千葉県柏市)
Year and Date
2014-10-11
Related Report
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