| Project/Area Number |
20740199
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics II
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| Research Institution | Hiroshima University |
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Principal Investigator |
INO Akihiro Hiroshima University, 大学院・理学研究科, 助教 (60363040)
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| Project Period (FY) |
2008 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 高温超伝導 / 角度分解光電子分光 / 電子構造 / 放射光 / 銅酸化物高温超伝導体 / 多体効果 / 超伝導ギャップ / フェルミ面 |
|---|
| Research Abstract |
Exploiting the high resolution and band selectivity of low-energy synchrotron-radiation angle-resolved-photoemission, we have directly determined fine quasiparticle structures in high-Tc cuprate superconductors. We found that weak in-plane potential disorder due to the out-of-plane impurities makes a strong pair-braking effect in d-wave superconducting state, and that it also makes a suppression of the screening by the electronic system, leading to the increase in electron-phonon interaction and elastic impurity scattering, and thus to the enhancement of the quasiparticle mass.
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