Sudden disappearance of the first-order transition in β-pyrochlore KOs2O6 under low pressure
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- Umeo Kazunori
- N-BARD, Hiroshima University
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- Kubo Hirokazu
- Department of Quantum Matter, ADSM, Hiroshima University
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- Yamaura Jun-ichi
- Institute for Solid State Physics, University of Tokyo
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- Hiroi Zenji
- Institute for Solid State Physics, University of Tokyo
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- Takabatake Toshiro
- Department of Quantum Matter, ADSM, Hiroshima University IAMR Hiroshima University
書誌事項
- タイトル別名
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- Sudden Disappearance of the First-Order Transition in β-Pyrochlore KOs<SUB>2</SUB>O<SUB>6</SUB> under Low Pressure
- Sudden disappearance of the first order transition in v pyrochlore KOs2O6 under low pressure
- 公開日
- 2009
- 資源種別
- journal article
- DOI
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- 10.1143/jpsj.78.123602
- 公開者
- 一般社団法人 日本物理学会
この論文をさがす
説明
We report the first observation of the pressure effect on the first-order transition at Tp=7.5 K in the β-pyrochlore oxide superconductor KOs2O6 by specific-heat measurement. The peak in the specific heat at Tp disappeared at a low pressure of 0.02 GPa. With increasing pressure up to 0.02 GPa, the coefficient of the T5 dependence of the specific heat increases by 30%. This finding implies that low-energy excitations of phonons are enhanced by the suppression of the first-order transition. However, the specific-heat jump at Tc is unchanged with pressure up to 1 GPa, indicating that the strong coupling superconductivity is rather robust under pressure.
収録刊行物
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- Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｐｈｙｓｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ｊａｐａｎ
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Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｐｈｙｓｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ｊａｐａｎ 78 (12), 123602-123602, 2009
一般社団法人 日本物理学会
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詳細情報 詳細情報について
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- CRID
- 1390282679173574656
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- NII論文ID
- 130005437253
- 40016879626
- 210000108099
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- NII書誌ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 10479837
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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