Pairing mechanism in Fe-based superconductors

  title={Pairing mechanism in Fe-based superconductors},
  author={Andrey V. Chubukov},
  journal={Annual Review of Condensed Matter Physics},
  • A. Chubukov
  • Published 1 October 2011
  • Physics
  • Annual Review of Condensed Matter Physics
I review recent works on the symmetry and the structure of the superconducting gap in Fe-based superconductors (FeSCs) and on the underlying pairing mechanism in these systems. The experimental data on superconductivity show very rich behavior, with potentially different symmetry of a superconducting state for different compositions of the same material. The variety of different pairing states raises the issue of whether the physics of FeSCs is model dependent or is universal, governed by a… 
Dome – like variation of the superconducting gap anisotropy in Fe-based superconductors
Experiments performed on different iron-based superconductors suggest a variety of possible structures of the superconducting energy gap, both nodeless and nodal. To understand the pairing
Using Gap Symmetry and Structure to Reveal the Pairing Mechanism in Fe-based Superconductors
Abstract I review theoretical ideas and implications of experiments for the gap structure and symmetry of the Fe-based superconductors. Unlike any other class of unconventional superconductors, one
Iron-based superconductors: Magnetism, superconductivity, and electronic structure (Review Article)
Angle resolved photoemission spectroscopy (ARPES) reveals the features of the electronic structure of quasi-two-dimensional crystals which are crucial for spin and charge ordering and determine the
Cooper pairing and fluctuations in Fe-based superconductors
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Coupled multiple-mode theory for s± pairing mechanism in iron based superconductors
A dynamical mode-mode coupling theory is developed based on the coupled Bethe-Salpeter equations for the interplay between the magnetic and the superconducting degrees of freedom in unconventional multi-band superconductors such as iron pnictides.
Coexistence of SC and AFM in two-orbital model for s±-wave iron based superconductors
Abstract The gap structure and pairing mechanism for iron based superconductors is hotly discussed as a central issue since their discovery. The long range order parameters, electronic specific heat,
Anisotropy of the superconducting fluctuations in multiband superconductors: the case of LiFeAs
Between the different families of pnictide multiband superconductors, LiFeAs is probably one of the less understood. Indeed, despite the large amount of experiments performed in the last few years on
Itinerant Magnetic Order and Multiorbital Effects in Iron-Based Superconductors
A comprehensive investigation of the relationship between magnetism and superconductivity in the iron-based superconductors, discovered in 2008 by Hideo Hosono and collaborators Kamihara et al. J.
Superconducting Gap in s±-Wave Iron-Based Superconductors
We present a theoretical model study of superconductivity for iron-based high-[Formula: see text] superconductors in s[Formula: see text]-wave symmetry, considering two degenerate orbitals and the
Pairing mechanism in multiband superconductors
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Materials and Novel Superconductivity in Iron Pnictide Superconductors
Since the first report on superconductivity at 26 K in F-doped LaOFeAs at the end of February 2008, the iron pnictide superconductor family has been quickly expanded to six different structures, and
Unified picture for magnetic correlations in iron-based superconductors.
The results reveal the crucial role of Hund's rule coupling for the strongly correlated nature of the system and suggest that the iron-based superconductors are closer kin to manganites than cuprates in terms of their diverse magnetism and incoherent normal-state electron transport.
Magnetism, superconductivity, and pairing symmetry in iron-based superconductors
We analyze antiferromagnetism and superconductivity in novel Fe-based superconductors within the itinerant model of small electron and hole pockets near 0,0 and ,. We argue that the effective
Functional renormalization-group study of the pairing symmetry and pairing mechanism of the FeAs-based high-temperature superconductor.
The fermion functional renormalization-group method is applied to determine the pairing symmetry and pairing mechanism of the FeAs-Based materials and finds an electronic-driven superconducting pairing instability.
Theory of magnetism and triplet superconductivity in LiFeAs
Superconducting pnictides are widely found to feature spin-singlet pairing in the vicinity of an antiferromagnetic phase, for which nesting between electron and hole Fermi surfaces is crucial. LiFeAs
The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
The response of the worldwide scientific community to the discovery in 2008 of superconductivity at T c = 26 K in the Fe-based compound LaFeAsO1−x F x has been very enthusiastic. In short order,
Near-degeneracy of several pairing channels in multiorbital models for the Fe pnictides
Weak-coupling approaches to the pairing problem in the iron pnictide superconductors have predicted a wide variety of superconducting ground states. We argue here that this is due both to the
Evidence for a nodal-line superconducting state in LaFePO.
Measurements of the penetration depth lambda(T) are reported in very clean samples of the related iron-phosphide superconductor, LaFePO, at temperatures down to approximately 100 mK to suggest the gap function is not universal for all pnictide superconductors.
Unconventional s-Wave Superconductivity in Fe(Se,Te)
Breaking Convention The defining characteristics of a superconductor are symmetry of gap function, which tells us something about how pairs of electrons move through the sample, and the strength of
Unconventional superconductivity with a sign reversal in the order parameter of LaFeAsO1-xFx.
We argue that the newly discovered superconductivity in a nearly magnetic, Fe-based layered compound is unconventional and mediated by antiferromagnetic spin fluctuations, though different from the