La-NQR Probe of Strong-Coupling<i>s</i>-Wave Superconductivity in LaRu<sub>3</sub>Si<sub>2</sub>
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- Kishimoto Yutaka
- Department of Physics, Faculty of Engineering, Tokushima University
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- Kawasaki Yu
- Department of Physics, Faculty of Engineering, Tokushima University
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- Ohno Takashi
- Department of Physics, Faculty of Engineering, Tokushima University
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- Gupta Laxmi C.
- Tata Institute for Fundamental Research
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- Ghosh Goutam
- Tata Institute for Fundamental Research
書誌事項
- タイトル別名
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- La-NQR Probe of Strong-Coupling s-Wave Superconductivity in LaRu3Si2
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説明
To investigate the electronic state of LaRu3Si2, we have carried out 139La-NQR measurement. In the normal state, the spin–lattice relaxation rate 1⁄T1 is proportional to the temperature T. 1⁄T1 shows a coherence peak just below the superconducting transition temperature Tc=6.5 K and decreases exponentially well below Tc. LaRu3Si2 is found to be a strong coupling BCS superconductor with a large energy gap 2Δ(0)=5.50kBTc. A relatively high Tc in LaRu3Si2 is presumably due to a high density of states of conduction electrons at Fermi surface and strong electron–phonon interaction.
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 73 (1), 190-193, 2004
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
- 1390282679163484416
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- NII論文ID
- 110001954710
- 210000104924
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- NII書誌ID
- AA00704814
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- BIBCODE
- 2004JPSJ...73..190K
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 6817789
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- 本文言語コード
- en
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