Superconducting Transition Temperatures of Cu(Co_1-<i>x</i>M_<i>x</i>)₂S₄

• Aito Natsuki

  Department of Physics, Division of Material Science, Nagoya University

• Sato Masatoshi

  Department of Physics, Division of Material Science, Nagoya University

書誌事項

タイトル別名

• Superconducting Transition Temperatures of Cu(Co1-xMx)2S4

抄録

Superconducting transition temperatures T_c have been measured for s-wave superconductors Cu(Co_1−xM_x)₂S₄ with varying x. The system is often considered to be a three dimensional version of the triangular lattice, because it has a three dimensional network of corner-sharing (Co_1−xM_x)₄ tetrahedra. As the M atom, Cr, Ir and Rh, which can substitute for Co, are used. Although T_c decreases linearly in x, the suppression rates |dT_c⁄dx| are much smaller than the values expected from the pair breaking due to magnetic impurities in s-wave superconductors. They are, of course, much smaller than those expected for the pair breaking due to non-magnetic impurities in superconducting systems with anisotropic order parameter. The behavior is very similar to that observed in the newly found superconductor Na_zCoO₂·yH₂O, which has two-dimensional layers of CoO₂ triangular lattice. It suggests that a same mechanism of the T_c suppression is working in the two systems and presents useful information on the symmetry of the superconducting order parameter of Na_zCoO₂·yH₂O. Brief arguments of a possible mechanism of the T_c suppression of the present system are given.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 73 (7), 1938-1943, 2004

  一般社団法人 日本物理学会

キーワード

• superconducting transition temperatures <I>T</I><SUB>c</SUB>
• impurity effects
• CuCo<SUB>2</SUB>S<SUB>4</SUB>
• Na<I><SUB>z</SUB></I>CoO<SUB>2</SUB>·<I>y</I>H<SUB>2</SUB>O

詳細情報

• CRID: 1390282679163953536
• NII論文ID: 110001954913
• NII論文ID: 210000104929
• NII論文ID: 130004538857
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.73.1938
• BIBCODE: 2004JPSJ...73.1938A
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 7004488
• Web Site: http://id.ndl.go.jp/bib/7004488
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7004488
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.73.1938
• 本文言語コード: en
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