| Project/Area Number |
22540377
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | National Institute for Materials Science |
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Principal Investigator |
HU Xiao 独立行政法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主任研究者 (90238428)
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| Project Period (FY) |
2010 – 2012
|
| Project Status |
Completed (Fiscal Year 2012)
|
| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 超伝導・密度波 / 鉄系とMgB2等の多成分超伝導 / 量子渦糸 / GL理論 / 超伝導 / 多成分超伝導 / 磁束状態 / 時間反転対称の破れ / 計算機シミュレーション / 鉄ニクタイト超伝導 / Leggettモード / 超伝導位相 / フラストレーション / 南部・ゴルスドンモード / 時間反転対称性 / MgB2 / 量子渦糸状態 / コヒーレンス長 / 磁場侵入長 / 渦糸コアサイズ |
|---|
| Research Abstract |
In multi-component superconductors, phase differences among order parameters can take nontrivial values other than 0 and π, which breaks time reversal symmetry, when inter-component interactions are repulsive. In this novel state, more than two coherence lengths diverge at the critical temperature, making the dichroism classification of superconductors based on the Ginzburg-Landau (GL) parameter invalid. As such, novel vortex states are expected. Moreover, a mutual phase oscillation among components (known as Leggett mode) takes a small energy and thus can exist stably as a collective mode.
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