Dynamical charge correlation of strongly correlated electrons studied by resonant inelastic scattering of synchrotron x-rays
| Project/Area Number |
16H04004
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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 I
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| Research Institution | National Institutes for Quantum and Radiological Science and Technology |
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Principal Investigator |
ISHII Kenji 国立研究開発法人量子科学技術研究開発機構, 関西光科学研究所 放射光科学研究センター, 上席研究員(定常) (40343933)
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| Co-Investigator(Kenkyū-buntansha) |
藤田 全基 東北大学, 金属材料研究所, 教授 (20303894)
筒井 健二 国立研究開発法人量子科学技術研究開発機構, 関西光科学研究所 放射光科学研究センター, 上席研究員(定常) (80291011)
水木 純一郎 関西学院大学, 理工学部, 教授 (90354977)
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| Project Period (FY) |
2016-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2017: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2016: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
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| Keywords | 物性実験 / 量子ビーム / 強相関電子系 / 光物性 |
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| Outline of Final Research Achievements |
We have succeeded to observe charge excitations in hole-doped cuprates using resonant inelastic x-ray scattering at the oxygen K-edge and clarified their momentum and doping dependence. Charge excitations in hole-doped nickelates show that the momentum dependence and energy scale of charge order are contrasting to those of the cuprates. The contrasts in the nickelates originate from the localized character of the holes which strongly couple with the spin and lattice degrees of freedom. In electron-doped cuprates, we found that the peak position and width of the charge excitations observed in Cu K-edge RIXS coincide excellently with those in Cu L3-edge RIXS, demonstrating the importance of complementary use of the multiple edges in RIXS. In the technical development of RIXS, we achieved the energy resolution of 44 meV at the Cu K-edge and applied it to observe electronic excitations in the one-dimensional cuprate.
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| Academic Significance and Societal Importance of the Research Achievements |
強相関遷移金属酸化物を対象として、これまでほとんど議論されてこなかった運動量依存性まで含めた電荷励起を通して電子状態、物性の議論が行えるようになり、その観測においてRIXSが有効であることを示すことができたことが学術的意義である。RIXSは触媒や電池電極など、遷移金属を含んだ実用材料を調べる上でも有用である。本研究で得られた知見はこれらの材料の電子状態解明に役立つと期待でき、材料の性能向上を通して研究成果を社会に還元できると期待できる。
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Report
(5 results)
Research Products
(76 results)
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[Journal Article] Observation of momentum-dependent charge excitations in hole-doped cuprates using resonant inelastic x-ray scattering at the oxygen K edge2017
Author(s)
K. Ishii, T. Tohyama, S. Asano, K. Sato, M. Fujita, S. Wakimoto, K. Tustsui, S. Sota, J. Miyawaki, H. Niwa, Y. Harada, J. Pelliciari, Y. Huang, T. Schmitt, Y. Yamamoto, and J. Mizuki
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Journal Title
Physical Review B
Volume: 96
Issue: 11
Pages: 115148-115148
DOI
NAID
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] Cu K端XANESとEXAFSの相補利用によるノンドープ銅酸化物超伝導体La1.8Eu0.2CuO4の電子状態に対するアニール効果の研究2019
Author(s)
浅野駿, 石井賢司, 松村大樹, 辻卓也, 伊奈稔哲, 齋藤真, 春原稔樹, 川股隆行, 小池洋二, 工藤康太, 藤田全基
Organizer
第22回XAFS討論会
Related Report
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[Presentation] 酸素Ｋ吸収端共鳴非弾性Ｘ線散乱によるホールドープ型銅酸化物超伝導体の電荷励起2018
Author(s)
石井賢司, 遠山貴巳, 浅野駿, 佐藤研太朗, 藤田全基, 脇本秀一, 宮脇淳, 丹羽秀治, 原田慈久, J. Pelliciari, Y. Huang, T. Schmitt, 山本義哉, 水木純一郎
Organizer
第31回日本放射光学会年会・放射光科学合同シンポジウム
Related Report
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[Presentation] 酸素K吸収端共鳴非弾性X線散乱によるホールドープ型銅酸化物超伝導体の電荷励起2018
Author(s)
石井賢司, 遠山貴巳, 浅野駿, 佐藤研太朗, 藤田全基, 脇本秀一, 宮脇淳, 丹羽秀治, 原田慈久, J. Pelliciari, Y. Huang, T. Schmitt, 山本義哉, 水木純一郎
Organizer
日本物理学会第73回年次大会
Related Report
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[Presentation] Observation of a dispersive charge mode in hole-doped cuprates using resonant inelastic x-ray scattering at the oxygen K edge2017
Author(s)
Kenji Ishii, Takami Tohyama, Shun Asano, Kentaro Sato, Masaki Fujita, Shuichi Wakimoto, Kenji Tustsui, Shigetoshi Sota, Jun Miyawaki, Hideharu Niwa, Yoshihisa Harada, Jonathan Pelliciari, Yaobo Huang, Thorsten Schmitt, Yoshiya Yamamoto, and Jun’ichiro Mizuki
Organizer
The 10th international conference on inelastic x-ray scattering
Related Report
Int'l Joint Research
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[Presentation] Momentum-resolved charge fluctuations proximate to the charge-order phase measured by resonant inelastic x-ray scattering2016
Author(s)
K. Ishii, M. Yoshida, M. Naka, S. Ishihara, I. Jarrige, K. Ikeuchi, Y. Murakami, K. Kudo, Y. Koike, T. Nagata, Y. Fukada, N. Ikeda, J. Mizuki
Organizer
International Conference on Low-Energy Electrodynamics in Solids, 2016
Place of Presentation
ラフォーレ琵琶湖（滋賀県守山市）
Year and Date
2016-05-29
Related Report
Int'l Joint Research
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