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

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

2008-04-10

arxiv.org/abs/0804.1739v3

Physics

Condensed Matter

Superconductivity

6 pages, 4 figures

Scientific paper

10.1103/PhysRevB.78.144517

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.

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