2011 Fiscal Year Final Research Report
Superconductivity and Fermi surface around quantum critical point
| Project/Area Number |
21340102
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Osaka University |
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Principal Investigator |
SETTAI Rikio 大阪大学, 大学院・理学研究科, 准教授 (00251041)
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| Co-Investigator(Renkei-kenkyūsha) |
ONUKI Yoshichika 大阪大学, 大学院・理学研究科, 教授 (40118659)
SUGIYAMA Kiyohiro 大阪大学, 大学院・理学研究科, 准教授 (00187676)
SUGAWARA Hitoshi 神戸大学, 大学院・理学研究科, 教授 (60264587)
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| Project Period (FY) |
2009 – 2011
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| Keywords | フェルミ面 / ドハース・ファンアルフェン効果 / 量子臨界点 / 磁性 / 超伝導 |
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| Research Abstract |
We have investigated the relationship between heavy fermion superconductivity and magnetism, especially in the noncentrosymmetic pressure-induced superconductor CeIrSi_3. Antiferromagnetism disappears and superconductivity appears around 2 GPa in CeIrSi_3. The antiferromagnetism is induced by applying the magnetic field, and the antiferromagnetism competes with superconductivity. The superconducting upper critical field H^<c2> is suppressed in the field-induced antiferromagneic phase. With increasing pressure the field-induced antiferromagnetic phase moves to very high magnetic field and the H^<c2> is extremely enhanced.
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[Presentation] De Haas-van Alphen Effect in YbIr2Zn202010
Author(s)
M. Matsushita, R. Settai, Y. Onuki, et al.
Organizer
International Conference on Core Research and Engineering Science of Advanced Materials
Place of Presentation
Osaka University Convention Center
Year and Date
2010-06-02
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