Is Fermi-Surface Nesting the Origin of Superconductivity in Iron Pnictides?: A Fluctuation–Exchange-Approximation Study
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- Arita Ryotaro
- Department of Applied Physics, University of Tokyo JST, TRIP JST, CREST
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- Ikeda Hiroaki
- Department of Physics, Kyoto University
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We study whether Fermi-surface (FS) nesting can give rise to high-temperature superconductivity in iron pnictides. Starting with ab initio construction of an effective four-orbital model, we employ the fluctuation–exchange approximation to show that FS does not necessarily favor the stripe antiferromagnetic order observed in experiments, especially for realistic electronic correlations. If superconductivity in iron pnictides is magnetically mediated and has a fully gapped sign-reversing s-wave symmetry, our results suggest that the pairing interaction does not arise only from FS nesting and that exchange interactions between local moments in the Fe 3d orbitals may play a crucial role.
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 78 (11), 113707-113707, 2009
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
- 1390001204197008256
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- NII論文ID
- 130005437188
- 40016829617
- 210000108057
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- NII書誌ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 10438985
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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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