observation of the glass-like localized state of electrons by X-ray and neutron PDF analysis
| Project/Area Number |
24510129
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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 |
Quantum beam science
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
KODAMA Katsuaki 独立行政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 (10313115)
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| Co-Investigator(Renkei-kenkyūsha) |
SHAMOTO Shin-ichi 独立行政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, 研究主席 (90235698)
YONEDA Yasuhiro 独立行政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 (30343924)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 電荷の短距離秩序 / 中性子散乱 / PDF解析 / 強相関電子系 |
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| Outline of Final Research Achievements |
We have performed local structural analysis by using the atomic pair distribution function (PDF) on LiMn2O4 and YBaCo2O5 which contain the single Mn and Co sites with the half-integer valences of +3.5 and +2.5, respectively, and exhibit non-metallic conductivities. The local structure of LiMn2O4 at room temperature determined by the PDF analysis includes inequivalent Mn sites with the valences of +3 and +4, indicating that the valence electrons of Mn atom are localized at the Mn sites only with short-range correlation, resulting in the non-metallic conductivity. The similar results are obtained in YBaCo2O5. These results suggest that such a glass-like state of valence electrons may be also probable in other compounds with the transition metal ions with non-integer valences and non-metallic conductivities.
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Report
(4 results)
Research Products
(22 results)
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[Journal Article] Superconductivity in Noncentrosymmetric Iridium Silicide Li2IrSi32014
Author(s)
S. Pyon, K. Kudo, J. Matsumura, H. Ishii, G. Matsuo, M. Nohara, H. Hojo, K. Oka, M. Azuma, V. Ovidiu Garlea, K. Kodama, and S. Shamoto
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Journal Title
J. Phys. Soc. Jpn.
Volume: 83
Issue: 9
Pages: 093706-093706
DOI
NAID
ISSN
0031-9015, 1347-4073
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Presentation] 鉄系高温超伝導体母相の磁気形状因子の異方性2014
Author(s)
樹神克明, 石角元志, 脇本秀一, 木方邦宏, 李哲虎, 伊豫彰, 永崎洋, 社本真一
Organizer
日本中性子科学会
Place of Presentation
北海道立道民活動センター「かでる２・７」（札幌市）
Year and Date
2014-12-11 – 2014-12-12
Related Report
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