Low temperature study of intermediate-valence Yb-based quasicrystals
| Project/Area Number |
24540386
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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 II
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
WATANUKI Tetsu 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 (30343932)
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| Co-Investigator(Renkei-kenkyūsha) |
ISHIMASA Tsutomu 北海道大学, 工学研究院, 教授 (10135270)
TSAI AnPang 東北大学, 多元物質科学研究所, 教授 (90225681)
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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 |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 金属 / 準結晶 / 量子臨界現象 / 価数揺動 / Ｘ線吸収分光 |
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| Outline of Final Research Achievements |
A quasiperiodic intermediate-valence system is realized in an icosahedral Yb-Au-Al quasicrystal. X-ray absorption spectroscopy indicates that quasiperiodically arranged Yb ions assume a mean valence of 2.61, between a divalent state and a trivalent one. At temperatures below 10 K, specific heat and magnetization measurements reveal non-Fermi-liquid behavior in this quasicrystal without either doping, pressure, or field tuning. Additionally, a heterogeneous valence state is likely to be realized.
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Report
(4 results)
Research Products
(15 results)
