2010 Fiscal Year Final Research Report
Study of the rattling transition in the pyrochlore oxide superconductors
| Project/Area Number |
20540311
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | The University of Tokyo |
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Principal Investigator |
YAMAURA Junichi The University of Tokyo, 物性研究所, 助教 (80292762)
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| Project Period (FY) |
2008 – 2010
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| Keywords | フォノン物性 |
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| Research Abstract |
We investigate the origin of the mechanism of the unknown phase transition (rattling transition) on the pyrochlore oxide superconductor β-KO_<s2>O_6. In this research, from a precise single crystal structure analysis, a detailed specific heat measurement, and a NMR measurement, the unusual thermal vibration of the K atom is thought to be a new type of phase transition with the change of the state of thermal vibrations in the oversized cage. This phase transition is the isomorphic structural phase-transition; and it is a very rare example of thermodynamics.
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[Presentation] β型パイロクロア酸化物の圧力下における結晶構造と超伝導特性
Author(s)
磯野貴之,原悠太,井口大輔,町田洋,井澤公一,筒井智嗣,大石泰生, B.Salce,J.Flouquet,小楠寛貴,山浦淳一,広井善二
Organizer
日本物理学会(秋季大会
Place of Presentation
大阪府立大学
Year and Date
00000923-00000926
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