| Project/Area Number |
23740280
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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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 | Japan Atomic Energy Agency |
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Principal Investigator |
NOMURA Takuji 独立行政法人日本原子力研究開発機構, 量子ビーム応用研究部門, 研究副主幹 (90373240)
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| Project Period (FY) |
2011 – 2012
|
| Project Status |
Completed (Fiscal Year 2012)
|
| Budget Amount *help |
¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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| Keywords | 強相関系 / スピン三重項超伝導 / Sr2RuO4 / d-ベクトル / dベクトル |
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| Research Abstract |
It has been considered that a quasi-two-dimensional ruthenate Sr2RuO4 is a spin-triplet superconductor and therefore its superconducting state is characterized by so-called “d-vector”. In the present study, we analyzed the pairing symmetry, on the basis of the precise electronic structure obtained from first-principles calculation. As a result, the favorable pairing symmetry was turned out to be singlet dx2-y2-wave, rather than triplet p-wave, in contrast to precedent studies based on simple Hubbard models. Concerning the triplet pairing state, removing degeneracy of d-vector states by the Ru4d spin-orbit coupling, we could demonstrate that the chiral state with d//c is the most stable.
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