Superconducting gap and pseudogap in iron-based layered superconductor La(O1-xFx)FeAs

• Sato Takafumi

  Department of Physics, Tohoku University

• Souma Seigo

  CREST, Japan Science and Technology Agency (JST) WPI Research Center, Advanced Institute for Materials Research, Tohoku University

• Nakayama Kosuke

  Department of Physics, Tohoku University

• Terashima Kensei

  Department of Physics, Tohoku University

• Sugawara Katsuaki

  Department of Physics, Tohoku University

• Takahashi Takashi

  Department of Physics, Tohoku University CREST, Japan Science and Technology Agency (JST) WPI Research Center, Advanced Institute for Materials Research, Tohoku University

• Kamihara Yoichi

  ERATO-SORST, Japan Science and Technology Agency (JST) and Frontier Research Center, Tokyo Institute of Technology

• Hirano Masahiro

  ERATO-SORST, Japan Science and Technology Agency (JST) and Frontier Research Center, Tokyo Institute of Technology

• Hosono Hideo

  ERATO-SORST, Japan Science and Technology Agency (JST) and Frontier Research Center, Tokyo Institute of Technology

書誌事項

タイトル別名

• Superconducting Gap and Pseudogap in Iron-Based Layered Superconductor La(O<SUB>1−<I>x</I></SUB>F<I><SUB>x</SUB></I>)FeAs
• Superconducting Gap and Pseudogap in Iron-Based Layered Superconductor La(O_1-<i>x</i>F_<i>x</i>)FeAs

抄録

We report high-resolution photoemission spectroscopy of newly-discovered iron-based layered superconductor La(O_0.93F_0.07)FeAs (T_c=24 K). We found that the superconducting gap shows a marked deviation from the isotropic s-wave symmetry. The estimated gap size at 5 K is 3.6 meV in the s- or axial p-wave case, while it is 4.1 meV in the polar p- or d-wave case. We also found a pseudogap of 15–20 meV above T_c, which is gradually filled-in with increasing temperature and closes at temperature far above T_c similarly to copper-oxide high-temperature superconductors.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 77 (6), 063708-063708, 2008

  一般社団法人 日本物理学会

キーワード

• superconducting gap
• pseudogap
• iron-based superconductor
• photoemission spectroscopy

詳細情報

• CRID: 1390282679174603392
• NII論文ID: 130005436443
• NII論文ID: 110006781571
• NII論文ID: 210000107260
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.77.063708
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 9534041
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9534041
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.77.063708
• 本文言語コード: en
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