Theory of Superconductivity in PuCoGa₅

• Tanaka Kazunori

  Department of Science, Kyoto University

• Ikeda Hiroaki

  Department of Science, Kyoto University

• Yamada Kosaku

  Department of Science, Kyoto University

書誌事項

タイトル別名

• Theory of Superconductivity in PuCoGa5

抄録

Recently, superconductivity in PuCoGa₅ was discovered. It has the same crystal structure as CeMIn₅ (M=Ir, Co, Rh), which are often refered to as Ce-115’s. The electron correlation in PuCoGa₅ is estimated to be weak compared with Ce-115’s, and the filling number of electrons is considered to be far from 0.5/spin in the band which plays an important role in realizing the superconductivity. Nevertheless, the superconducting transition temperature T_c in PuCoGa₅ is almost by an order of magnitude higher than that in Ce-115’s. In order to explain the superconductivity with high T_c, we adopt the periodic Anderson model and calculate T_c by solving the Dyson–Gor’kov equation derived by the third order perturbation theory with respect to U. By this calculation, we indicate that the superconducting state of PuCoGa₅ is a d-wave pairing state, and show that the good location of two Fermi surfaces results in the high T_c in PuCoGa₅.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 73 (5), 1285-1289, 2004

  一般社団法人 日本物理学会

キーワード

• unconventional superconductivity
• periodic Anderson model
• heavy Fermion
• plutonium

詳細情報

• CRID: 1390001204186384640
• NII論文ID: 210000104814
• NII論文ID: 110001954845
• NII論文ID: 130004538765
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.73.1285
• BIBCODE: 2004JPSJ...73.1285T
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 6940855
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6940855
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.73.1285
• 本文言語コード: en
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