Specific heat and tunneling spectroscopy study of NbB2 with maximum Tc~10K
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- Kuroiwa Sogo
- Department of Physics and Mathematics, Aoyama Gakuin University
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- Tomita Yoko
- Department of Physics and Mathematics, Aoyama Gakuin University
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- Sugimoto Akira
- Graduate School of Integrated Arts and Sciences, Hiroshima University
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- Ekino Toshikazu
- Graduate School of Integrated Arts and Sciences, Hiroshima University
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- Akimitsu Jun
- Department of Physics and Mathematics, Aoyama Gakuin University
書誌事項
- タイトル別名
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- Specific Heat and Tunneling Spectroscopy Study of NbB<SUB>2</SUB> with Maximum <I>T</I><SUB>c</SUB>∼10 K
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We report on magnetic, transport, specific heat and tunneling measurements of NbB2 with the maximum superconducting critical temperature Tc∼10 K. The essential superconducting properties have been investigated through mapping out the critical field phase diagram, from which it is turned out to be type II superconductor with a small Ginzbrug–Landau parameter κ∼2.2. Both the tunneling and specific heat measurements indicate that our NbB2 specimen has a single gap and s-wave pairing symmetry with a weak-coupling limit. The electron–phonon coupling constant is estimated to be λep=0.71±0.02, suggesting that the maximum Tc of NbB2 can be explained by the McMillan formula.
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 (9), 094705-094705, 2007
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
- 1390282679175117184
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- NII論文ID
- 130005297038
- 110006418608
- 210000106883
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- NII書誌ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 8907433
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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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- 使用不可