Pairing symmetry and properties of iron-based high temperature superconductors
arXiv:0805.0923 · doi:10.1209/0295-5075/85/57007
Abstract
Pairing symmetry is important to indentify the pairing mechanism. The analysis becomes particularly timely and important for the newly discovered iron-based multi-orbital superconductors. From group theory point of view we classified all pairing matrices (in the orbital space) that carry irreducible representations of the system. The quasiparticle gap falls into three categories: full, nodal and gapless. The nodal-gap states show conventional Volovik effect even for on-site pairing. The gapless states are odd in orbital space, have a negative superfluid density and are therefore unstable. In connection to experiments we proposed possible pairing states and implications for the pairing mechanism.
4 pages, 1 table, 2 figures, polished version
References in corpus (31)
- Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
- Superconductivity at 43 K in Samarium-arsenide Oxides
- Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsOF}
- LaFeAsOF: A low carrier density superconductor near itinerant magnetism
- Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeOFFeAs
- Superconductivity at 22 K in Co-doped BaFe2As2 Crystals
- Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
- Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
- Superconductivity and Phase Diagram in the Iron-based Arsenic-oxides ReFeAsO1-delta (Re = rare earth metal) without F-Doping
- Strong Correlations and Magnetic Frustration in the High Tc Iron Pnictides
- Theory of Electron Nematic Order in LaOFeAs
- Superconductivity at 25 K in hole doped
- Origin of the ~150 K Anomaly in LaOFeAs; Competing Antiferromagnetic Superexchange Interactions, Frustration, and Structural Phase Transition
- Correlated electronic structure of LaOFeAs
- A minimal two-band model for the superconducting Fe-pnictides
- The BCS-like gap in superconductor SmFeAsO_0.85F_0.15
- Electron-Hole Symmetry and Magnetic Coupling in Antiferromagnetic LaOFeAs
- Evolution from Itinerant Antiferromagnet to Unconventional Superconductor with Fluorine Doping in La(O_{1-x}F_{x})FeAs Revealed by ^{75}As and ^{139}La Nuclear Magnetic Resonance
- As NMR studies of superconducting LaOFFeAs
- Proximity of antiferromagnetism and superconductivity in LaOFFeAs: effective Hamiltonian from ab initio studies
- Antiferromagnetic superexchange interactions in LaOFeAs
- Iron-based layered superconductor LaOFFeAs: an antiferromagnetic semimetal
- Spin-singlet superconductivity with multiple gaps in PrO0.89F0.11FeAs
- Field and Temperature Dependence of the Superfluid Density in LaO_{1-x}F_xFeAs Superconductors: A Muon Spin Relaxation Study
- Even Parity, Orbital Singlet and Spin Triplet Pairing for Superconducting
- 19-F NMR Investigation of Iron-pnictide Superconductor LaFeAsO(0.89)F(0.11)
- Point-Contact Spectroscopy of Iron-Based Layered Superconductor LaOFFeAs
- A Generic Two-band Model for Unconventional Superconductivity and Spin-Density-Wave Order in Electron and Hole Doped Iron-Based Superconductors
- High Temperature Superconductivity in Transition Metal Oxypnictides: a Rare-Earth Puzzle?
- Point contact Andreev reflection spectroscopy of NdFeAsO_0.85
- Symmetry of superconducting states with two orbitals on a tetragonal lattice: application to