中国物理B ›› 2013, Vol. 22 ›› Issue (8): 87411-087411.doi: 10.1088/1674-1056/22/8/087411

所属专题: TOPICAL REVIEW — Iron-based high temperature superconductors

• TOPICAL REVIEW—Iron-based high temperature superconductors • 上一篇    下一篇

Spin fluctuations and unconventional superconducting pairing in iron-based superconductors

于顺利, 李建新   

  1. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
  • 收稿日期:2013-06-16 修回日期:2013-06-24 出版日期:2013-06-27 发布日期:2013-06-27
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 91021001, 11190023, and 11204125) and the National Basic Research Program of China (Grants Nos. 2011CB922101 and 2011CB605902).

Spin fluctuations and unconventional superconducting pairing in iron-based superconductors

Yu Shun-Li (于顺利), Li Jian-Xin (李建新)   

  1. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
  • Received:2013-06-16 Revised:2013-06-24 Online:2013-06-27 Published:2013-06-27
  • Contact: Li Jian-Xin E-mail:jxli@nju.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 91021001, 11190023, and 11204125) and the National Basic Research Program of China (Grants Nos. 2011CB922101 and 2011CB605902).

摘要: In this article, we review the recent theoretical works on the spin fluctuations and superconductivity in iron-based superconductors. Using the fluctuation exchange approximation and multi-orbital tight-binding models, we study the characteristics of the spin fluctuations and the symmetries of the superconducting gaps for different iron-based superconductors. We explore the systems with both electron-like and hole-like Fermi surfaces (FS) and the systems with only the electron-like FS. We argue that the spin-fluctuation theories are successful in explaining at least the essential part of the problems, indicating that the spin fluctuation is the common origin of superconductivity in iron-based superconductors.

关键词: iron-base superconductors, spin fluctuations, pairing symmetry

Abstract: In this article, we review the recent theoretical works on the spin fluctuations and superconductivity in iron-based superconductors. Using the fluctuation exchange approximation and multi-orbital tight-binding models, we study the characteristics of the spin fluctuations and the symmetries of the superconducting gaps for different iron-based superconductors. We explore the systems with both electron-like and hole-like Fermi surfaces (FS) and the systems with only the electron-like FS. We argue that the spin-fluctuation theories are successful in explaining at least the essential part of the problems, indicating that the spin fluctuation is the common origin of superconductivity in iron-based superconductors.

Key words: iron-base superconductors, spin fluctuations, pairing symmetry

中图分类号:  (Pnictides and chalcogenides)

  • 74.70.Xa
74.20.-z (Theories and models of superconducting state) 74.20.Rp (Pairing symmetries (other than s-wave))