| Project/Area Number |
25400333
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
Ishii Kenji 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 量子ビーム応用研究センター, 研究主幹 (40343933)
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| Co-Investigator(Kenkyū-buntansha) |
FUJITA Masaki 東北大学, 金属材料研究所, 教授 (20303894)
WAKIMOTO Shuichi 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 量子ビーム応用研究センター, 研究主幹 (40399415)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | Ｘ線散乱 / 非弾性散乱 / 銅酸化物超伝導体 / 磁気励起 / 電荷励起 / スピン励起 |
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| Outline of Final Research Achievements |
Resonant inelastic x-ray scattering (RIXS) has recently made significant progress as a spectroscopic technique. We observed spin and charge excitations in high-Tc superconducting cuprates using this technique and studied electron dynamics in carrier-doped Mott insulators. Spin excitations in electron-doped system shift to higher energy accompanied with broadening of the width upon doping. On the other hand, spin excitations in hole-doped systems are also broadened but keep the energy almost unchanged from the parent compound. In addition, dispersive charge excitations are observed above the spin excitations in electron-doped systems and peak energy is found to move toward higher energy with increasing doping.
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