Suppression of superconductivity by spin fluctuations in iron-based superconductors

• Yamase, Hiroyuki

• Agatsuma, Tomoaki

抄録

We study the superconducting instability mediated by spin fluctuations in the Eliashberg theory for a minimal two-band model of iron-based superconductors. While antiferromagnetic spin fluctuations can drive superconductivity (SC) as is well established, we find that spin fluctuations necessarily contain a contribution to suppress SC even though SC can eventually occur at lower temperatures. This self-restraint effect stems from a general feature of the spin-fluctuation mechanism, namely, the repulsive pairing interaction, which leads to phase frustration of the pairing gap and consequently the suppression of SC.

収録刊行物

• Physical Review B

  Physical Review B 102 (6), 060504-, 2020-08-27

  American Physical Society (APS)

詳細情報

• CRID: 1050286428449580928
• NII論文ID: 120006891508
• DOI: 10.1103/physrevb.102.060504
• ISSN: 24699969
• ISSN: 24699950
• HANDLE: 2115/79525
• Web Site: https://link.aps.org/article/10.1103/PhysRevB.102.060504
• Web Site: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.102.060504/fulltext
• 本文言語コード: en
• 資料種別: journal article
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