Superconductivity and Fermi surface around quantum critical point
Project/Area Number |
21340102
|
Research Category |
Grant-in-Aid for Scientific Research (B)
|
Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Condensed matter physics II
|
Research Institution | Osaka University |
Principal Investigator |
SETTAI Rikio 大阪大学, 大学院・理学研究科, 准教授 (00251041)
|
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)
|
Project Period (FY) |
2009 – 2011
|
Project Status |
Completed (Fiscal Year 2011)
|
Budget Amount *help |
¥19,630,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥4,530,000)
Fiscal Year 2011: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2010: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2009: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
|
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 |
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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Report
(4 results)
Research Products
(136 results)