Spin fluctuations and unconventional superconducting pairing in iron-based superconductors

doi:10.1088/1674-1056/22/8/087411

摘要/Abstract

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))

于顺利, 李建新. Spin fluctuations and unconventional superconducting pairing in iron-based superconductors[J]. 中国物理B, 2013, 22(8): 87411-087411.

Yu Shun-Li (于顺利), Li Jian-Xin (李建新). Spin fluctuations and unconventional superconducting pairing in iron-based superconductors[J]. Chin. Phys. B, 2013, 22(8): 87411-087411.

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