Spin-triplet p-wave pairing in a 3-orbital model for iron pnictide superconductors

Abstract

We examine the possibility that the superconductivity in the newly discovered FeAs materials may be caused by the Coulomb interaction between d-electrons of the iron atoms. We find that when the Hund's rule ferromagnetic interaction is strong enough, the leading pairing instability is in spin-triplet p-wave channel in the weak coupling limit. The resulting superconducting gap has nodal lines on the 3D Fermi surfaces. The k dependent hybridization of several orbitals around a Fermi pocket is the key for the appearance of the spin-triplet p-wave pairing.

6 pages, 4 figures

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Cited by in corpus (20)

• Funtional Renormalization Group Study of the Pairing Symmetry and Pairing Mechanism of the FeAs Based High Temperature Superconductors
• Nodal Spin Density Wave and band topology of the FeAs based materials
• Spin Fluctuations, Interband Coupling, and Unconventional Pairing in Iron-based Superconductors
• Antiferromagnetically Driven Electronic Correlation in Iron Pnictides and Cuprates
• Origin of Gap Anisotropy in Spin Fluctuation Models of the Fe-pnictides
• Neutron Scattering Resonance and the Fe-pnictide Superconducting Gap
• Observation of the Josephson effect in Pb/(Ba,K)Fe2As2 single crystal junctions
• Narrow superconducting window in Ni-doped LaFeAsO
• Theory for Superconductivity in Iron Pnictides at Large Coulomb U Limit
• Tight binding model for iron pnictides
• Band renormalization and Fermi surface reconstruction in iron-based superconductors
• On interband pairing in multiorbital systems
• Quantum waveguide theory of Andreev reflection in multiband superconductors: the case of Fe-pnictides
• Orbital fluctuation mechanism for superconductivity in iron-based compounds
• Effective Hamiltonian for FeAs based superconductors
• Effect of the tetrahedral distortion on the electronic properties of iron-pnictides
• Optical Study of LaO_0.9F_0.1FeAs: Evidence for a Weakly Coupled Superconducting State
• Induced P-wave superfluidity within full energy-momentum dependent Eliashberg approximation in asymmetric dilute Fermi gases
• Evidence for Local Moment by Electron Spin Resonance Study on Polycrystalline LaFeAsO${}_{1-x}$F${}_x$ (x=0 and 0.13)
• Conventional Superconductivity in Fe-Based Pnictides: the Relevance of Intra-Band Electron-Boson Scattering