Investigation of chiral superconductivity in uranium-based compounds
| Project/Area Number |
15K13514
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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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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| Co-Investigator(Renkei-kenkyūsha) |
SHIMOZAWA MASAAKI 東京大学, 物性研究所, 助教 (40736162)
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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 |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 時間反転対称性 / カイラリティ / ドメイン / 強相関超伝導 / 重い電子系 / 磁場侵入長 / 走査型プローブ顕微鏡 / 超伝導ギャップ / 対称性の破れ / 非従来型超伝導 / 鉄系超伝導 / カイラル反強磁性体 / ドメイン構造 / ウラン化合物 |
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| Outline of Final Research Achievements |
We propose two experiments detecting chiral superconducting state with broken time reversal symmetry which has been discussed in strongly correlated systems. One is high-resolution measurements of magnetic field distribution by using scanning magnetic probe microscopy, and the other is high-precision anisotropic measurements of penetration depth down to very low temperatures. We have been developing the former microscopy with a miniature Hall probe as well as superconducting quantum interference device, and have succeeded in testing it for a chiral magnet. For the latter, low-temperature measurements down to 30 mK became available, and for a uranium compound we have obtained temperature dependence expected for the chiral superconducting state. In addition, we obtained unexpected results of the emergence of chiral superconductivity in the vicinity of twin boundaries in the iron-based superconductor FeSe.
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Report
(3 results)
Research Products
(13 results)
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[Journal Article] Evidence for Time-Reversal Symmetry Breaking of the Superconducting State near Twin-Boundary Interfaces in FeSe Revealed by Scanning Tunneling Spectroscopy2015
Author(s)
T. Watashige, Y. Tsutsumi, T. Hanaguri, Y. Kohsaka, S. Kasahara, A. Furusaki, M. Sigrist, C. Meingast, T. Wolf, H. v. Loehneysen, T. Shibauchi, and Y. Matsuda
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Journal Title
Phys. Rev. X
Volume: 5
Issue: 3
Pages: 031022-031022
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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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
Place of Presentation
大阪大学
Year and Date
2017-03-17
Related Report
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[Presentation] レーザー角度分解光電子分光によるFeSeの軌道秩序状態における超伝導ギャップ異方性の観測 22016
Author(s)
橋本嵩, 大田由, 山本遇, 鈴木裕也, 下志万貴博, 渡部俊太郎, C.-T. Chen, 綿重達哉, 小林遼, 笠原成, 松田祐司, 芝内孝禎, 岡崎浩三, 辛埴
Organizer
日本物理学会 2016年秋季大会
Place of Presentation
金沢大学
Year and Date
2016-09-13
Related Report
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[Presentation] 極低温磁場侵入長測定と不純物効果から見た重い電子系超伝導体CeCu2Si2のギャップ構造2016
Author(s)
竹中崇了, 水上雄太, 新井佑基, J. Wilcox, C. Putzke, A. Carrington, S. Seiro, H. S. Jeevan, C. Geibel, M. Konczykowski, 常盤欣文, 松田祐司, 芝内孝禎
Organizer
日本物理学会 第71回年次大会
Place of Presentation
東北学院大学
Year and Date
2016-03-19
Related Report
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[Presentation] 走査型SQUID顕微鏡システムの試作と検証2015
Author(s)
下澤雅明, 鈴木喜貴, 杉井かおり, 山下穣, 小山大介, 河端美樹, 河合淳, 笠原成, 松田祐司, 末吉孝充, 水上雄太, 芝内孝禎
Organizer
日本物理学会 2015年秋季大会
Place of Presentation
関西大学
Year and Date
2015-09-16
Related Report
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