Rattling phenomena in the beta-pyrochlore oxides and related compounds
Project/Area Number |
22340092
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Condensed matter physics II
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Research Institution | The University of Tokyo |
Principal Investigator |
HIROI Zenji 東京大学, 物性研究所, 教授 (30192719)
|
Co-Investigator(Kenkyū-buntansha) |
OKAMOTO Yoshihiko 東京大学, 物性研究所, 助教 (90435636)
YAMAURA Junichi 東京大学, 物性研究所, 助教 (80292762)
|
Project Period (FY) |
2010-04-01 – 2014-03-31
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Project Status |
Completed (Fiscal Year 2013)
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Budget Amount *help |
¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000)
Fiscal Year 2013: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2012: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2011: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
|
Keywords | ラットリング / 超伝導 / カゴ状化合物 / 電子格子相互作用 / 籠状化合物 / βパイロクロア酸化物 / 新物質探索 / 物性実験 / パイロクロア酸化物 |
Research Abstract |
Rattling is the local vibration of a relatively small atom/ion encapsulated in an atomic cage in a crystal and strongly interacts with surrounding electrons on the cage owing to the unusually large amplitude of the vibration associated with the anharmonicity. This electron-rattling interaction causes a strong-coupling superconductivity and a large mass enhancement of conduction electrons. We have focused on a typical cage compound beta-pyrochlore oxides and studied the rattling phenomena through crystal growth, structural analyses and physical property measurements. We have successfully obtained experimental evidence to show the essential feature of the rattling.
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Report
(5 results)
Research Products
(27 results)
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[Journal Article] J.Phys.Soc.Jpn.2010
Author(s)
H.Ogusu, N.Takeshita, K.Izawa, J.Yamaura, Y.Ohishi, S.Tsutsui, Y.Okamoto, Z.Hiroi
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Journal Title
Superconducting and Structural Transitions in the β-Pyrochlore Oxide K 0s_2O_6 under High Pressure
Volume: 79
Related Report
Peer Reviewed
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