Physics – Condensed Matter – Superconductivity
Scientific paper
2008-07-03
Physical Review Letters, 102, 047005 (2009)
Physics
Condensed Matter
Superconductivity
4 pages, 4 figures, published version
Scientific paper
10.1103/PhysRevLett.102.047005
We apply the fermion functional renormalization group method to determine the pairing symmetry and pairing mechanism of the FeAs-Based materials. Within a five band model with pure repulsive interactions, we find an electronic-driven superconducting pairing instability. For the doping and interaction parameters we have examined, extended s-wave, whose order parameter takes on opposite sign on the electron and hole pockets, is always the most favorable pairing symmetry. The pairing mechanism is the inter Fermi surface Josephson scattering generated by the antiferromagnetic correlation.
Lee Dung-Hai
Ran Ying
Vishwanath Ashvin
Wang Faming
Zhai Hui
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