Recent Advances in Ce-Based Heavy-Fermion Superconductivity and Fermi Surface Properties
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- Settai Rikio
- Graduate School of Science, Osaka University
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- Takeuchi Tetsuya
- Low Temperature Center, Osaka University
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- Onuki Yoshichika
- Graduate School of Science, Osaka University Low Temperature Center, Osaka University Advanced Science Research Center, Japan Atomic Energy Research Institute
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We present the recent advances in Ce-based heavy fermion superconductivity. Heavy fermions are formed by the competition between the Ruderman–Kittel–Kasuya–Yosida interaction and the Kondo effect. The application of pressure is useful for controlling the electronic states in antiferromagnets such as CeRh2Si2, Ce2Ni3Ge5, CeIn3, CeRhIn5, and CeIrSi3. For these compounds, the Néel temperature TN decreases with increasing pressure and reaches zero at the quantum critical pressure Pc. Superconductivity appears around Pc. In CeRu2, CeCoIn5, and CePt3Si, superconductivity is realized at ambient pressure. For these pressure-induced and ambient-pressure superconductors, we clarified their unconventional characteristics of superconductivity, the close relationship between superconductivity and the dimensionality of the electronic states, and a new aspect of superconductivity in the non-centrosymmetric crystal structure, together with its Fermi surface instability at Pc.
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 76 (5), 051003-051003, 2007
一般社団法人 日本物理学会
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キーワード
- RKKY interaction
- Kondo effect
- anisotropic superconductivity
- non-centrosymmetric superconductivity
- quantum critical point
- de Haas–van Alphen effect
- Fermi surface
- specific heat
- CeRu<SUB>2</SUB>
- CeRh<SUB>2</SUB>Si<SUB>2</SUB>
- Ce<SUB>2</SUB>Ni<SUB>3</SUB>Ge<SUB>5</SUB>
- CeIn<SUB>3</SUB>
- CeRhIn<SUB>5</SUB>
- CeCoIn<SUB>5</SUB>
- CePt<SUB>3</SUB>Si
- CeIrSi<SUB>3</SUB>
詳細情報 詳細情報について
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- CRID
- 1390001204193800320
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- NII論文ID
- 130005296732
- 110006273159
- 210000106664
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- NII書誌ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 8728642
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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
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