Superconducting characteristics and pairing symmetry in uranium based heavy fermion superconductors studied by nuclear magnetic resonance
| Project/Area Number |
18340106
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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 | Kobe University (2007-2009)
Hiroshima University (2006) |
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Principal Investigator |
TOU Hideki Kobe University, 大学院・理学研究科, 教授 (60295467)
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| Co-Investigator(Kenkyū-buntansha) |
SERA Masafumi 広島大学, 大学院・先端物質科学研究科 (40196978)
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| Research Collaborator |
KOTEGAWA Hisashi 神戸大学, 大学院・理学研究科, 准教授 (30372684)
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| Project Period (FY) |
2006 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥16,800,000 (Direct Cost: ¥15,300,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2008: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2007: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2006: ¥10,300,000 (Direct Cost: ¥10,300,000)
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| Keywords | スピン3重項超伝導 / ナイトシフト / 核磁気共鳴 / 異方的超伝導 / 重い電子超伝導体 / 重い電子超伝導 / 非フェルミ流体状態 / NMR / スピン三重項超伝導 / 量子臨界点 / 低温 / 超伝導 |
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| Research Abstract |
^9Be Nuclear Magnetic Resonance (NMR) measurements were carried out for a single crystal UBe_<13> in order to clarify its mechanism of superconductivity. From the field-angle-dependence of ^9Be NMR measurements, the Be 2p orbital perpendicular to the mirror plane contributes mainly to the conduction band. In the superconducting state, we found that ^9Be-NMR Knight shift for H||[001] does not change at all. This result is consistent with the spin-triplet pairing state in UBe_<13>. In addition, unusual behavior observed in RF surface impedance measurements suggest that UBe_<13> has multiple superconducting phases.
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Report
(6 results)
Research Products
(61 results)
