2013年12月15日
Local Correlation Effects on the s_{\pm}- and s_{++}-Wave Superconductivities Mediated by Magnetic and Orbital Fluctuations in the Five-Orbital Hubbard Model for Iron Pnictides
J Phys Soc Jpn
- ,
- ,
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- 巻
- 82
- 号
- 12
- 開始ページ
- 123712
- 終了ページ
- 123712
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.7566/jpsj.82.123712
- 出版者・発行元
- The Physical Society of Japan
We investigate the electronic state and the superconductivity in the five-orbital Hubbard model for iron pnictides by using the dynamical mean-field theory in conjunction with the Eliashberg equation. The renormalization factor exhibits significant orbital dependence resulting in the large change in the band dispersion as observed in recent ARPES experiments. The critical interactions towards the magnetic, orbital and superconducting instabilities are suppressed as compared with those from the random phase approximation (RPA) due to local correlation effects. Remarkably, the s_{++}-pairing phase due to the orbital fluctuation is largely expanded relative to the RPA result, while the s_{\pm}-pairing phase due to the magnetic fluctuation is reduced.
- リンク情報
- ID情報
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- DOI : 10.7566/jpsj.82.123712
- ISSN : 0031-9015
- eISSN : 1347-4073
- CiNii Articles ID : 150000107894
- ORCIDのPut Code : 112176296