Study of novel electric states down to ultra-low temperatures
| Project/Area Number |
15K17691
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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) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 超低温物性 / 強相関電子系 / 超伝導 / 量子臨界性 / 超低温 |
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| Outline of Final Research Achievements |
The main focus of this study was to study the strongly-correlated electron systems down to unprecedented ultra-low temperatures (~1 mK); The lowest temperature of the current studies has been limited to ~50 mK. As a first step, we performed quantum oscillation measurements of the d-wave superconductor CeCoIn5 to verify the applicability of these measurements at ultra-low temperatures. Unexpectedly, we found anomalous changes in the quantum oscillation measurements at ultra-low temperatures, indicating an emergence of unknown ordered phase neighboring to the superconducting phase. Although CeCoIn5 has been inferred to be located in the vicinity of a quantum critical point (QCP), no ordered phase corresponding to the QCP has been observed. Our findings not only reveal this long-standing mystery of CeCoIn5, but also demonstrate the presence of rich physics in unexplored ultra-low temperature region.
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Report
(3 results)
Research Products
(22 results)
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[Journal Article] Dome-Shaped Magnetic Order Competing with High-Temperature Superconductivity at High Pressures in FeSe2016
Author(s)
J. P. Sun, K. Matsuura, G. Z. Ye, Y. Mizukami, M. Shimozawa, K. Matsubayashi, M. Yamashita, T. Watashige, S. Kasahara, Y. Matsuda, J.-Q. Yan, B. C. Sales, Y. Uwatoko, J.-G. Cheng, and T. Shibauch
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Journal Title
Nature Communications
Volume: 7
Pages: 12146-12146
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Presentation] CeCoIn5における超低温下NMR測定II2017
Author(s)
田代光輝, 山田章悟, 下澤雅明, 杉井かおり, 山下穣, 谷口貴紀, 武田晃, 瀧川仁, 宍戸寛明
Organizer
日本物理学会 第７２回年次大会（２０１７年）
Place of Presentation
大阪大学 豊中キャンパス（大阪府吹田市）
Year and Date
2017-03-17
Related Report
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[Presentation] カイラル反強磁性体Mn3Snの局所磁化測定2017
Author(s)
向笠清隆, 下澤雅明, 鈴木喜貴, 山下穣, Muhammad Ikhras, 冨田崇弘, 肥後友也, 中辻知, Marcin Konczykowski, 松田祐司, 松浦康平, 水上雄太, 芝内孝禎, 近藤潤, 杉井かおり, 中村壮智, 勝本信吾
Organizer
日本物理学会 第７２回年次大会（２０１７年）
Place of Presentation
大阪大学 豊中キャンパス（大阪府吹田市）
Year and Date
2017-03-17
Related Report
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[Presentation] CeCoIn5における超低温下NMR測定2016
Author(s)
田代光揮, 山田章悟, 下澤雅明, 杉井かおり, 山下穣, 谷口貴紀, 武田晃, 瀧川仁, 宍戸寛明
Organizer
日本物理学会 2016年秋季大会
Place of Presentation
金沢大学 角間キャンパス（石川県・金沢市）
Year and Date
2016-09-13
Related Report
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[Presentation] Mn3Snの異常熱ホール効果2016
Author(s)
杉井かおり, 今井悠介, 下澤雅明, Muhammad Ikhlas, 清原直樹, 冨田崇弘, 中辻知, 山下穣
Organizer
日本物理学会 2016年秋季大会
Place of Presentation
金沢大学 角間キャンパス（石川県・金沢市）
Year and Date
2016-09-13
Related Report
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[Presentation] Mn3Snの熱ホール測定2016
Author(s)
今井悠介
Organizer
日本物理学会 第７１回年次大会（２０１６年）
Place of Presentation
東北学院大学泉キャンパス（宮城県、仙台市）
Year and Date
2016-03-19
Related Report
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