Suppression of superconductivity by spin fluctuations in iron-based superconductors

Yamase, Hiroyuki; Agatsuma, Tomoaki

Physical Review B, 2020, 102(6), 060504

Permalink : https://hdl.handle.net/2115/79525

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ファイル	フォーマット	サイズ	閲覧回数	説明
Phys. Rev. B 102-6_060504(R)	pdf	420 KB	444

アクセス権	open access
URI	https://hdl.handle.net/2115/79525
タイトル	Suppression of superconductivity by spin fluctuations in iron-based superconductors
著者	著者名 Yamase, Hiroyuki
著者	著者名 Agatsuma, Tomoaki
言語	英語
発行日	2020-08-27
出版者	American Physical Society (APS)
収録物名	Physical Review B
巻(号)	102(6)
ページ	060504
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.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	©2020 American Physical Society
PISSN	2469-9950
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1103/PhysRevB.102.060504