Enhancement of Superconducting Transition Temperature in CeCu_<b>2</b>Ge_<b>2</b>under High Pressures

• Kobayashi Tatsuo C.

  Research Center for Materials Science at Extreme Conditions, Osaka University, Toyonaka, Osaka 560 CREST, Japan Science and Technology Corporation (JST)

• Miyazu Tadashi

  Department of Physical Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560

• Takeshita Nao

  Department of Physical Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560

• Shimizu Katsuya

  Department of Physical Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560 CREST, Japan Science and Technology Corporation (JST)

• Amaya Kiichi

  Department of Physical Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560 CREST, Japan Science and Technology Corporation (JST)

• Kitaoka Yoshio

  Department of Physical Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560 CREST, Japan Science and Technology Corporation (JST)

• Onuki Yoshichika

  Department of Physics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560

書誌事項

タイトル別名

• Enhancement of Superconducting Transition Temperature in CeCu2Ge2 under High Pressures.
• Enhancement of Superconducting Transiti

抄録

Enhancement of superconducting transition temperature T_c is confirmed at around 16 GPa in the pressure-induced superconductor CeCu_2Ge_2.The superconducting H_c-T_c phase diagrams at the low-T_c and high-T_c pressure regions indicates that the heavy quasi particles form the singlet Cooper pairs.At both low-T_c and high-T_c pressure regions, Fermi liquid behavior of ρ-- AT^2 is observed only at low temperatures below 1 K in the normal state induced by the external field above H_c2.At 21 GPa where the superconductivity disappears down to 50 mK, the temperature region following ρ-- AT^2 increases drastically up to 40 K and the coefficient A decreases rapidly.These results indicate that the strongly correlated electrons are responsible essentially for the appearance of superconductivity in this system.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 67 (3), 996-999, 1998

  一般社団法人 日本物理学会

キーワード

• heavy fermion
• superconductivity
• high pressure
• transport properties

詳細情報

• CRID: 1390001204181679232
• NII論文ID: 110001970823
• NII論文ID: 130004536454
• NII論文ID: 210000101470
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.67.996
• BIBCODE: 1998JPSJ...67..996K
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 4450265
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4450265
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.67.996
• 本文言語コード: en
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