Valence fluctuations revealed by magnetic field and pressure scans: comparison with experiments in YbXCu4 (X = In, Ag, Cd) and CeYIn5 (Y = Ir, Rh)
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- Watanabe Shinji
- Department of Applied Physics, University of Tokyo
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- Tsuruta Atsushi
- Division of Materials Physics, Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University
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- Miyake Kazumasa
- Division of Materials Physics, Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University
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- Flouquet Jacques
- Département de la Recherche Fondamentale sur la Matière Condenseé, SPSMS, CEA Grenoble
書誌事項
- タイトル別名
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- Valence Fluctuations Revealed by Magnetic Field and Pressure Scans: Comparison with Experiments in YbXCu<SUB>4</SUB> (X=In, Ag, Cd) and CeYIn<SUB>5</SUB> (Y=Ir, Rh)
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The mechanism of how critical end points of the first-order valence transition (FOVT) are controlled by a magnetic field is discussed. We demonstrate that critical temperature is suppressed to be a quantum critical point (QCP) by a magnetic field. This results explain the field dependence of the isostructural FOVT observed in Ce metal and YbInCu4. Magnetic field scan can make the system reenter in a critical valence fluctuation region. Even in intermediate-valence materials, the QCP is induced by applying a magnetic field, at which magnetic susceptibility also diverges. The driving force of the field-induced QCP is shown to be a cooperative phenomenon of the Zeeman effect and the Kondo effect, which creates a distinct energy scale from the Kondo temperature. The key concept is that the closeness to the QCP of the FOVT is vital in understanding Ce- and Yb-based heavy-fermions. This explains the peculiar magnetic and transport responses in CeYIn5 (Y=Ir, Rh) and metamagnetic transition in YbXCu4 for X=In as well as the sharp contrast between X=Ag and Cd.
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 (10), 104706-104706, 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
- 1390001204197106304
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- NII論文ID
- 130005437123
- 210000108026
- 40016772360
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- NII書誌ID
- AA00704814
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- BIBCODE
- 2009JPSJ...78j4706W
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- ISSN
- 13474073
- 00319015
- http://id.crossref.org/issn/00319015
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- NDL書誌ID
- 10390694
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可
