Pairing mechanism of multiband full-gap superconductivity in heavy-electron systems
| Project/Area Number |
15K05158
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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 | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
SAKAKIBARA Toshiro 東京大学, 物性研究所, 教授 (70162287)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 重い電子系超伝導 / 超伝導ギャップ / 比熱 / 磁場回転 / 圧力下比熱 / 磁場角度依存性 / 重い電子系 / 超伝導 / 静水圧力 / 角度分解磁場中比熱 / ギャップ対称性 |
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| Outline of Final Research Achievements |
Pairing mechanism of heavy-fermion superconductivity has attracted much attention because the first discovered heavy-fermion superconductor CeCu2Si2 has been unexpectedly revealed to be a multiband full-gap superconductor. In this study, we have examined the gap symmetry of CeCu2Si2 and those of various exotic superconductors, in order to deepen understanding of their exotic pairing mechanisms. Furthermore, we developed an apparatus for measuring field-angle-dependent specific heat under pressure to study the pressure effect on the gap structure.
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Report
(4 results)
Research Products
(49 results)
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[Journal Article] Fully gapped superconductivity with no sign change in the prototypical heavy-fermion CeCu2Si22017
Author(s)
T. Yamashita, T. Takenaka, Y. Tokiwa, J. A. Wilcox, Y. Mizukami, D. Terazawa, Y. Kasahara, S. Kittaka, T. Sakakibara, M. Konczykowski, S. Seiro, H. S. Jeevan, C. Geibel, C. Putzke, T. Onishi, H. Ikeda, A. Carrington, T. Shibauchi, Y. Matsuda
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Journal Title
Science Advances
Volume: 3
Issue: 6
Pages: 1601667-1601667
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Quadrupole-Driven Non-Fermi Liquid and Magnetic-Field Induced Heavy Fermion States in a Non-Kramers Doublet System2016
Author(s)
T. Onimaru, K. Izawa, K. T. Matsumoto, T. Yoshida, Y. Machida, T. Ikeura, K. Wakiya, K. Umeo, S. Kittaka, K. Araki, T. Sakakibara, T. Takabatake
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Journal Title
Phys. Rev. B
Volume: 94
Issue: 7
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Presentation] Superconducting gap structure of Sr2RuO4 revisited by the field-angle-dependent specific heat at very low temperatures2017
Author(s)
S. Kittaka, S. Nakamura, T. Sakakibara, N. Kikugawa, T. Terashima, S. Uji, D. Sokolov, A. P. Mackenzie, K. Irie, Y. Tsutsumi, and K. Machida
Organizer
International Conference on Strongly Correlated Electron Systems 2017 (SCES2017)
Related Report
Int'l Joint Research
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